| Medal record | ||
|---|---|---|
| Men’s baseball | ||
Representing  Cuba | ||
| Summer Olympics | ||
 | 1996 Atlanta | Team |
| Intercontinental Cup | ||
| 1995 Havana | Team |
 | 1997 Barcelona | Team |
Rey Isaac Vaillant (born January 3, 1973, in Santiago de Cuba) is a Cuban baseball player and Olympic gold medalist.
Vaillant is a one time gold medalist for baseball, winning at the 1996 Summer Olympics.
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Baseball at the 2004 Summer Olympics was held on two separate diamonds within the Helliniko Olympic Complex, from 15 to 25 August. For the second time in Olympic competition, professional baseball players were eligible to participate, though no active players from Major League Baseball were available.
Baseball had its second appearance as an official medal sport at the 1996 Summer Olympics in Atlanta, United States, with games played at Atlanta–Fulton County Stadium. Eight nations competed, with the preliminary phase consisting of each team playing every other team. Playoffs were then held, with the four highest ranked teams advancing. For the semifinals, the 1st place team played the 4th place team and the 2nd place team played against the 3rd place team. The winners of those semifinals competed against each other for the gold medal, with the loser getting the silver medal. The teams defeated in the semifinal played a match for the bronze medal.
Baseball at the 1992 Summer Olympics marked the debut of baseball as an official medal sport at the Olympics. The games were contested in Barcelona as part of the 1992 Summer Olympics. Baseball was an event open only to amateurs, although Cuba used its best players as they were amateurs in name only with all necessary funding coming from the state. The maximum roster size was 20 players per team.
Baseball at the 1984 Summer Olympics was a demonstration sport. Although single exhibition games had been played in conjunction with five previous Olympics, it was the first time that the sport was officially included in the program, and also the first time that the sport was played in Olympics held in the United States. Eight teams competed in Los Angeles, California, in the tournament. Games were held at Dodger Stadium. Cuba originally qualified but withdrew as a result of the Soviet-led boycott.
Baseball at the 1988 Summer Olympics was a demonstration sport for the seventh time. Eight teams competed in Jamsil Baseball Stadium in the baseball tournament. The format used was the same as the tournament of four years earlier. Five teams that had competed in the 1984 tournament returned.
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Cuba competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's nineteenth appearance in the Olympics. With baseball's removal from the Olympic program and the absence of the nation's volleyball team for the first time, the Cuban Olympic Committee sent the nation's smallest delegation to the Games since 1964. A total of 111 athletes, 66 men and 45 women, competed in 13 sports. There was only a single competitor in archery and table tennis.