Osiris G. Matos Jimenez is a right-handed Major League Baseball relief pitcher for the San Francisco Giants organization. Originally signed by the Giants in 2002, he started his professional career off in 2003, with the AZL Giants - he went 2-2 with a 4.67 ERA in nine games, six of which he started. 2004 was an improvement for him and again with the AZL Giants, he went 2-0 with a 2.44 ERA in 11 games, eight of which he started. He also struck out 47 batters in 48 innings of work. In 2005, he pitched for the Augusta Greenjackets. In 29 games , he did poorly, posting an 8-8 record with a 4.99... ERA. He struck out only 79 batters in 135⅓ innings of work. In 2006, Matos split time between the Greenjackets and Connecticut Defenders, Matos did extremely well - especially with the Greenjackets. He was used entirely as a reliever, he appeared in 44 games for the Greenjackets, saving 13 games and striking out 81 batters in 61 innings of work. He posted a 1.77 ERA with them. He then went on to pitch in six games for the Defenders, posting a 3.72 ERA there, saving two more games. Overall, he had a 1.
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| Birthdate: | August 6, 1984 |
| Birthplace: | Santo Domingo |
| Age: | 27 |
| All Positions Played: | Relief pitcher |