The History of Baseball Collective Bargaining: Strikes, Lockouts and Agreements

By 4Baseball Staff · November 5, 2026 · 11 min read

How baseball moved from owner control to negotiated labor contracts, from Marvin Miller and the 1972 strike through 1981, 1994-95 and the 2021-22 lockout, with what each fight was about and how it ended.

For most of the sport's first century, baseball's players had no say in their pay, their contracts or where they played. Every work stoppage since 1972 has been a fight over how much of that control to hand back, and each one produced a rule that fans now take for granted: salary arbitration, free agency, the luxury tax, drug testing, the universal designated hitter. The history of baseball collective bargaining is therefore also the history of how the modern game got its shape.

This article walks through the stoppages in order: the 1972 strike, the 1973 and 1976 lockouts, the 1980 and 1981 fights, the 1985 and 1990 disputes, the long 1994-95 strike that cost a World Series, and the 2021-22 lockout. For each it explains what the two sides wanted, what was at stake and what changed. It is a summary of documented history, not a verdict, and the sport's labor agreements are public documents that readers can study in more detail through the players' union and the commissioner's office.

What collective bargaining means in baseball

Collective bargaining is the process by which employers and a union negotiate the terms of employment for a whole group. In baseball the two sides are the clubs, represented by the commissioner's office and a management committee, and the Major League Baseball Players Association (MLBPA). Their agreement is called the Basic Agreement or, more often now, the collective bargaining agreement (CBA). It sets the minimum salary, the rules for salary arbitration, the conditions for free agency, pension and health benefits, the process for grievances and, in recent decades, tax and revenue-sharing rules for payrolls.

Two words matter in this history. A strike is a refusal by the workers to work. A lockout is the reverse: the owners keep the players out, as they did in the spring training of 1973, 1976 and 1990 and during the winter of 2021-22. A third word, impasse, describes the point at which negotiations stall; under American labor law an employer that reaches a genuine impasse may in some cases impose its last offer, which is why the legal fight over that question mattered so much in 1995.

Before the union: owners held every card

The foundation of owner control was the reserve clause, which tied a player to his club year after year. That subject has its own history in the article on the reserve clause and how it ended, and the short version is that the clause meant a player who refused the contract he was offered had nowhere else to play. Players tried to organize several times. A Brotherhood of Professional Base Ball Players was founded in the 1880s, and in 1890 many of its members left the National League to start a rival Players' League, which lasted only a single season. A pension plan arrived in the late 1940s, after a short-lived attempt to organize the players in 1946.

What existed in the 1950s and early 1960s was a players' association that was weak and often seen as reflecting the owners' view. The change came in 1966, when the players chose Marvin Miller, an economist who had worked for the United Steelworkers, as the association's executive director. Miller's early moves were practical: he collected for players a share of the money from licensing their names and images, built the association into a functioning union with dues and dedicated staff, and began to press for a real contract.

1968 and 1970: the first agreements

The result was the first Basic Agreement, in 1968, which raised the minimum salary and set up a way to handle disputes. In 1970 the second agreement went further by introducing a grievance procedure that ended with an independent arbitrator rather than with the commissioner, who was employed by the owners. That change looks procedural, but it mattered greatly five years later, because it created the forum in which free agency was won.

The Curt Flood case ran in parallel. Flood, a Cardinals outfielder, refused a trade in 1969 and sued to challenge the reserve clause under antitrust law. He lost: in 1972 the Supreme Court upheld baseball's long-standing exemption from antitrust law, while describing that exemption as an anomaly. The union's strategy therefore moved from the courts to the bargaining table and the arbitration hearing. The details of Flood's suit and of the later arbitration are covered in the reserve clause article.

1972: the first strike

The first general strike in the history of major-league baseball began on April 1, 1972, and ended on April 13. The dispute was over the pension and health plan: the players wanted the owners to increase their funding to account for rising costs, and the owners had resisted. The strike cancelled 86 games, and when play resumed the missed games were not made up. Because some clubs had played more games than others, the 1972 American League East was decided by half a game, with Detroit finishing ahead of Boston, a result that highlighted how the stoppage had distorted the standings.

The strike was short, but its significance was large. It showed that the players would act together, that their union could hold, and that the owners could not ignore it. It also set a pattern in which both sides used the calendar as leverage, since a stoppage that threatens opening day costs both sides money and goodwill.

1973 to 1976: arbitration and free agency

The 1973 agreement came after a lockout of spring training that was resolved before the regular season. Its major gain for the players was salary arbitration, in which a neutral arbitrator picks either the player's figure or the club's figure in a salary dispute. Salary arbitration was the first mechanism that let players with some service time be paid something close to market value even without free agency, and it began working in 1974. The same agreement included the so-called 10-and-5 rule, which gave veteran players the right to veto trades.

The deeper change came at the end of 1975. Pitcher Andy Messersmith had played the 1975 season without a signed contract, and he and Dave McNally joined a grievance in which the union argued that the reserve clause bound a player for only one extra year, not forever. The independent arbitrator, Peter Seitz, agreed in December 1975, and the courts later upheld his ruling. The owners then locked out spring training in 1976, and Commissioner Bowie Kuhn ordered the camps open, which ended the lockout. A new agreement in the summer of 1976 settled the terms: after six years of major-league service, a player could become a free agent. How free agency works and where it came from explains the mechanics in detail, and the history of baseball salaries shows what followed for pay.

1980 and 1981: a strike over compensation

The next fight was about the cost of free agency to the clubs that lost players. Owners wanted a team that lost a top free agent to receive a major-league player in return, not just a draft pick, which would have made players with high market value less attractive to sign. The players saw it as an attempt to undo free agency by other means.

In 1980 the two sides came close to a strike. The players walked out for the last week of spring training, then reached a deal that postponed the question. The postponement did not solve it, and the issue returned. On June 12, 1981, the players went on strike, and play did not resume until August. The stoppage lasted about 50 days and cancelled more than 700 games. A compromise created a pool of players from which a club losing a premium free agent could select compensation.

The owners had bought strike insurance, which gave them some financial cover. The sport had to improvise a postseason: it split the year into two halves and crowned a winner in each, with an extra playoff round, and it produced a famous oddity. The Cincinnati Reds, who had the best overall record in baseball at 66-42, did not qualify because they won neither half. The Reds' story is told in the history of the Cincinnati Reds, and their 1981 season remains the standard example of why the format was criticized.

1985 and the collusion years

In 1985 the players struck again, for two days in early August, over arbitration eligibility and the pension. The settlement was quick, and the games were made up. The more consequential issue of the period was not a strike at all. In the winters after 1985, free agents found few offers, and the union filed grievances claiming that owners had agreed among themselves not to bid, which would violate the agreement. Three separate arbitration decisions, covering the winters of 1985, 1986 and 1987, found collusion. A settlement in 1990 that is often cited at roughly $280 million compensated players, and some players were granted free agency again as a result of the rulings.

The collusion cases deserve attention because they show a different side of labor conflict: much of what the union won was won through grievances that enforced the contract, not through strikes. They also left a lasting distrust between the sides.

1990: the spring lockout

In the winter of 1989-90 the owners locked out the players, closing spring training camps for about a month. The immediate issues were the pension, the arbitration system and a proposal by owners to link pay to revenue. The lockout ended in March 1990, the regular season was played in full, and the agreement improved pension funding and arbitration eligibility. It also confirmed that both sides were prepared to use a stoppage as a negotiating tool.

1994 and 1995: the strike that canceled a World Series

The longest and most damaging stoppage began on August 12, 1994. The owners wanted a salary cap, a limit on payroll tied to club revenue, while the players refused any cap and said they would not trade the freedoms won in the 1970s for one. The owners' side was led by Bud Selig, who was then the acting commissioner. On September 14, 1994, the remainder of the season, including the postseason, was canceled, and for the first time since 1904 there was no World Series.

The cancellation fell in the middle of several memorable seasons. The Montreal Expos had the best record in baseball when play stopped, at 74-40, and Tony Gwynn was hitting .394. Neither the Expos nor Gwynn had a chance to finish.

The dispute continued into 1995. The owners prepared to open spring training with replacement players, and the union responded with legal action. A federal judge, Sonia Sotomayor, granted an injunction in late March 1995 that restored the old terms of employment and effectively ended the strike on April 2, 1995. The lost time was about 232 days. The 1995 season was shortened to 144 games per club, and attendance fell as fans reacted to the stoppage. Several years passed before the sport's popularity recovered.

The agreements since 1996

The strike ended without a new contract. The deal reached in late 1996 contained no salary cap. Instead it introduced a luxury tax, a payroll threshold above which clubs paid a tax, and a revenue-sharing plan to move money from richer clubs to poorer ones. Interleague play began in 1997 as part of the changes of that period.

In 2002 the sides reached a new agreement just before a strike deadline on August 30, a result that was widely seen as a relief after 1994. It continued the luxury tax, which is now often called the competitive balance tax, and put survey testing for steroids into the contract. Later agreements in 2006, 2011 and 2016 were all reached without a stoppage. The 2011 agreement changed how amateur signing bonuses are limited and ended the older compensation system for free agents, and the 2016 agreement adjusted the tax thresholds and other economic terms. Between 1996 and 2021, no strike or lockout interrupted a season, the longest stretch of labor peace in the modern history of the sport.

2021 and 2022: the lockout

The 2016 agreement expired on December 1, 2021, and the owners locked out the players the next day. It was the first work stoppage in baseball since 1994-95, and the first lockout since 1990. The players' main complaints were about the economics of the sport: the pay of players before they reach arbitration, the thresholds of the competitive balance tax, which they argued had become a de facto ceiling, and the way clubs manage service time and tank for draft picks.

The lockout lasted 99 days, ending on March 10, 2022, and it delayed the start of the regular season by about a week. All 162 games were played, using doubleheaders, but the spring training schedule was cut short. The agreement raised the minimum salary and the tax thresholds, created a bonus pool for young players who perform well before arbitration, introduced a draft lottery, expanded the postseason to 12 teams, and brought the designated hitter to the National League. The universal DH and the twelve-team playoff are the two changes most visible to fans.

A table of the stoppages

What the fights were really about

Looking at the whole list, four themes recur. The first is control: the reserve clause, free agency and the compensation pools are all versions of the question who decides where a player works. The second is money: pensions in 1972, the salary cap in 1994, the tax thresholds in 2021. The third is information and trust: the collusion cases and the late-1990s disputes about the finances of clubs showed that each side suspected the other of bad faith. The fourth is timing: with the exception of the 1994 strike, most stoppages came at the start of the season or in the spring, when the owners had the least revenue at risk and the players the least pay to lose.

What the history does show is that every concession won at the table was followed by a new set of rules, and that the sport continued to grow. The commissioners who represented the owners in these fights, from Bowie Kuhn to Rob Manfred, are discussed in the history of the commissioners.

Common questions

Why was there no World Series in 1994? The strike that began on August 12 was still unresolved in mid-September, and the acting commissioner canceled the rest of the season, including the postseason.

Is a strike the same as a lockout? No. In a strike the workers stop working. In a lockout the employer closes the workplace. The 2021-22 stoppage was a lockout.

Did fans lose games in 1981? Yes, more than 700, which is why that season was split into two halves.

What is the collective bargaining agreement? It is the labor contract between the clubs and the players' union. As of the 2025 season, the most recent one was the agreement reached in March 2022; readers should check the official sources for its current terms and expiration.

Where to go next

For the rules that came out of these negotiations, read how free agency works and the history of baseball salaries. The people on the owners' side are in the commissioners article, and the wider business story is collected under the business and labor topic page. The league's current standings are on the standings page.