Pittsburgh's Mitch Keller aims to lead Pirates to victory against Colorado's rookie Bradley Blalock.

Pittsburgh's Mitch Keller, who stayed with the team despite trade rumors, faces the Colorado Rockies on Sunday, aiming to help the Pirates salvage a win. The Rockies, looking to secure their first home series win of the year, will start rookie Bradley Blalock. Keller has shown recent improvement with a 3.02 ERA over his last nine games and has won his last three decisions.