Pirates' Mitch Keller: Unimpressive in minors

Keller allowed six runs (four earned) on seven hits and one walk in five innings for Triple-A Indianapolis on Saturday. He walked three while striking out nine batters.

Since being demoted to the minors, Keller has compiled a 3.21 ERA in 28 innings for Indy but is still struggling with his command. While the 25-year-old has struck out 39 batters he's walked 13 (including nine in his last three starts). Keller will likely get another shot with Pittsburgh prior to season's end, but he hasn't dominated Triple-A the way the organization had hoped.