CHICAGO (AP) -- Matt Garza is set to come off the disabled list and make his first start of the season for the Chicago Cubs on Tuesday against Pittsburgh.
Right-hander Carlos Villanueva is heading to the Chicago bullpen. The Cubs announced the shuffle Saturday.
Garza hasn't pitched in the majors this season after suffering a strained back muscle in spring training. In his fourth rehab start, the right-hander pitched six shutout innings for Triple-A Iowa and struck out six.
Villanueva got off to a strong start for the Cubs but has struggled recently. Over his first four starts, Villanueva (1-3) gave up five earned runs, but he has allowed 18 over his last four. He hasn't won since April 18. In his last start, he allowed 12 hits and seven earned against Colorado.