Adding a starting pitcher is a must for the Chicago Cubs. With Justin Steele out of the mix for the rest of the season, their already-thin rotation has been pushed to the limit during the past couple of months. The return of Shota Imanaga came at the perfect time and was very welcome, but to truly make a deep run in the playoffs, the front office has to add another ace-caliber arm to the equation. The veteran right-hander had a resurgent year with the New York Mets last season, posting a 3.91 ERA in 31 starts that was reminiscent of what he did before his shoulder and elbow injuries.