Jason Michael Grilli is an American former professional baseball pitcher. He played in Major League Baseball (MLB) for the Florida Marlins, Chicago White Sox, Detroit Tigers, Colorado Rockies, Pittsburgh Pirates, Los Angeles Angels of Anaheim, Atlanta Braves, Toronto Blue Jays, and Texas Rangers. Taken as the fourth overall selection of the 1997 MLB draft by the San Francisco Giants, Grilli was one of the top starting pitcher prospects in all of Minor League Baseball, ranked 54th in 1998 and 44th in 1999. The Giants traded him to the Florida Marlins in 1999, for whom he debuted on May 11, 2000.