T.R. Sullivan of MLB.com reports that the Rangers have designated reliever Josh Rupe for assignment.
Rupe had allowed 12 hits and eight earned runs during 4 2/3 innings of work. He was replaced on the 25-man roster by Derek Holland, the club's 2008 Minor League Pitcher of the Year. Holland, 22, went 13-1 with a 2.27 ERA in 26 starts last season between Single-A and Double-A. He'll work out of the bullpen initially.