I just don't see Garza as a filling a true need for Detroit. Porcello (their No. 5) is their weak link in the rotation. Everyone else is performing well, or in Verlander's case, he believes figured out his issue, is in the process of making the corrections, and seems to be returning to form. Trading for Garza to replace a number 5 wouldn't meet the needs for either team. Detroit would have to overpay based on what it would take to acquire other #5 starters, or the Cubs would have to take less than Garza's real value, even as a rental. Porcello would easily be right with Wood and Shark in our rotation right now. His ERA may not be reflecting it, but he's been a 1.7 fWAR pitcher so far this year. Shark is 2.4, Wood 2.1. I would trade Garza for Porcello straight up right now. Porcello is a free agent after 2015. He's looking at probably ~8M for 2014, I wouldn't be completely shocked if Detroit non-tendered him.