Pimentel pitched six scoreless innings for Triple-A Iowa on Friday.

Save for a couple of clunkers, Pimentel has been excellent over his last nine starts for Iowa, as he's 4-2 with a 2.12 ERA, 1.22 WHIP, and 37:22 K:BB ratio in 46.2 innings. Of course, those clunkers count in the stats, and his problem with walks isn't going away. He may get a spot start or two in Chicago this year, but his ceiling isn't very high.