Gray will wear uniform number 34 and be eligible for this afternoon's game against the Milwaukee Brewers at Wrigley Field.
The 28-year-old Gray has tossed three scoreless relief appearances with Iowa this spring covering 4.0 innings pitched. He also turned in two scoreless relief outings with the Cubs during Cactus League play after being sidelined the majority of spring training with a right groin strain.
Acquired by the Cubs from Oakland last December 3, Gray went 0-1 with a 3.76 ERA (11 ER/26.1 IP) in 24 relief appearances last season with the Athletics. The righthander walked only four batters in 26.1 innings pitched while striking out 19. Gray did not allow an earned run in 15 of his first 19 outings, turning in a 1.71 ERA (4 ER/21.0 IP) through September 19.
The six-foot-three, 196-pound Gray split the 2009 campaign between Oakland and Triple-A Sacramento. Gray went 2-2 with 16 saves and a 1.54 ERA (7 ER/41.0 IP) in 37 Triple-A relief outings. Combined between Oakland and Sacramento last year, Gray posted a 2.41 ERA (18 ER/67.1 IP) and walked only 10 batters in 67.1 innings pitched.
Overall, Gray is 0-1 with a 4.35 ERA (15 ER/31.0 IP) in 29 career major league relief outings and is 21-21 with 36 saves and a 3.34 ERA (139 ER/374.2 IP) in 215 minor league outings (24 starts).
Caridad is 0-1 with a 13.50 ERA (4 ER/2.2 IP) in four relief appearances with the Cubs this season.
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