Paulino has struggled in four starts with the White Sox, with none worse than Friday's when he gave up 10 runs on 13 hits in 3 2/3 innings. The team says he has rotator cuff inflammation.
Paulino has struggled with injuries in recent years, but the White Sox still committed $1.75 million to him for this season. As a member of the Kansas City Royals in 2012, Paulino had Tommy John surgery at midseason, and last year he developed shoulder issues during his rehabilitation that required an arthroscopic procedure.
Rienzo is expected to slide into Paulino’s spot in the rotation starting next week at Detroit. The right-hander made 10 starts with the White Sox last season, going 2-3 with a 4.82 ERA. He struggled with his command at times last season and those issues appeared to continue this year at Charlotte, where he had a 4.83 ERA over his first three starts.
In other pitching news, left-hander Donnie Veal was outrighted to Charlotte. He was designated for assignment Thursday after posting a 7.50 ERA with the White Sox this season.