Guillermo Reynoso Mota
- Bats Right, Throws Right
- Height 6' 4", Weight 205 lb.
- High School Liceo Jose Joaquin Perez
- Debut May 2, 1999
- Final Game October 2, 2012
- Born July 25, 1973 in San Pedro de Macoris, San Pedro de Macoris, D.R.
Guillermo Mota was signed in 1990 as an infielder by the New York Mets. He was in the Mets' system until the Montreal Expos drafted him in the minor league phase of the 1996 Rule V Draft. The Expos then immediately converted him to pitching in 1997 and put him on a fast track to the majors. By early May of 1999, he was in the majors. He hit a home run in his first major league plate appearance; it came on June 9th against Mark Guthrie of the Boston Red Sox in an interleague game at Stade Olympique. It was his only plate appearance of the season; he hit another homer for the Los Angeles Dodgers in 2003 and was 9 for 48 (.188) lifetime, with a solid slugging percentage (for a pitcher) of .354.
He was often seen as a potential closer, but faltered when the opportunity to take the role arose, although he had considerable success at times as a set-up man. However, consistency was a problem for him, and he moved from team to team in his major league career as a result. He only saved 10 games during his career, in 743 pitching appearances, all of them in relief.
In May 2012, while playing for the San Francisco Giants, Mota was suspended for 100 games for a second violation of MLB's Drug Policy. The Commissioner's office said the right-hander tested positive for Clenbuterol. Previously, in November 2006, while with the New York Mets, Mota had been suspended for the first 50 games of the 2007 season. Mota came back to finish the 2012 season with the Giants, and then pitched three times in the postseason, giving up 4 runs in 1 2/3 innings. He was not used as the Giants swept the Detroit Tigers in the 2012 World Series, then did not pitch anywhere in 2013 before announcing his retirement as spring training got under way the next year.
- Won two World Series with the San Francisco Giants in 2010 and 2012 (he did not play in the 2012 World Series)