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.

"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.

The Chicago Cubs may have a tremendous chance to acquire their top target if they are willing to deal at the trade deadline.