Analyzing the Matt Garza deal
First, however, let's look at the Rangers side of the deal. Garza was the best pitcher believed to be on the market, Cliff Lee pipe dreams notwithstanding. The Rangers have had starting pitching issues this year, primarily with injuries. Guys like Alexi Ogando and Neftali Feliz have been injured most of the season, and their replacements have been mostly ineffective. Garza this year has been his usual solid self, with a 3.17 ERA and good strikeout and walk ratios. One concern performance wise is he's a bit homer prone, which could be a probably at the Ballpark at Arlington. Make no mistake, while Garza is a good pitcher, he is not an ace. The good news for Texas is with Yu Darvish and Derek Holland at the top of the rotation, Garza doesn't have to be. He'll slot in as the #3 starter, and with the top two and promising rookie Martin Perez, the Rangers have a very good rotation if healthy. That is the primary concern with Garza, who has a history of arm trouble.
Of the three prospects the Cubs receive (with a 4th to be named later), Mike Olt is the most known. Olt was considered a decent third base prospect who was blocked in Texas by Adrian Beltre, but didn't quite have the bat for first base, making him trade bait. However, Olt has been recovering from a concussion, and vision issues from that might be why he's only hitting .213/.317/.422. If he recovers, he can be a useful cheap piece for a while. Justin Grimm is a 24 year old rookie starter. Unfortunately, it hasn't gone well for Grimm, who has a 6.37 ERA in 17 starts. He doesn't miss enough bats and hitters have destroyed him. He's just a guy.
The lottery ticket in C.J. Edwards, a right handed starting pitcher. He's having a great year in A-ball striking out almost 12 per 9. At 21, he's a bit old for the level, and being in regular A-ball means he has a long way to go. Given Garza's health issues and the fact that's he a half season rental (he's a free agent), this is a nice haul for Chicago. This is a win-win deal for both sides.