The clock is ticking as MLB teams try make deals before the arrival of the trade deadline. Whether it's a big bat or a bullpen arm, this year's playoff hopefuls are looking to find that missing piece that could put them over the top in the postseason.

Barring a dramatic shift on Thursday, the Pittsburgh Pirates are likely to keep right-hander Mitch Keller, according to major-league sources briefed on their discussions.A trade of Keller represents perhaps the Pirates’ best chance to acquire impact offensive talent.