With things moving quickly at the trade deadline, a potential target for the Chicago Cubs has come off the board. The Cubs have done a nice job so far of improving their pitching staff, but there have been some notable relievers who have moved so far.

"The Cubs desperately want another starter at the deadline, targeting Mitch Keller of the Pirates, and would include outfield prospect Owen Caissie to make it work," Nightengale wrote on Sunday. Keller has previously been an All Star, and he would be a boost near the front of the Cubs' rotation.

Locked in a battle with the Milwaukee Brewers atop the NL Central, the Chicago Cubs have four spots on the roster they would like to address prior to the trade deadline.