Bush, who was the first overall selection in the 2004 First-Year Player Draft, was designated for assignment by the Padres on Friday in order to vacate a spot on San Diego's roster for veteran Cliff Floyd. The 23-year-old Bush was originally drafted out of high school as a shortstop, but he moved to the mound during the '07 season.
Bush hasn't advanced above Class A in his Minor League career, and he didn't pitch in 2008 after undergoing Tommy John ligament replacement surgery on his throwing elbow. Two seasons ago, Bush went 1-0 with a 1.17 ERA and 16 strikeouts over 7 2/3 innings in seven games before injuring his arm.
In order to clear room on the roster for Bush, the Blue Jays released right-hander Dirk Hayhurst, who was claimed off waivers from the Padres in October.
Jordan Bastian is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.