A 27-year-old righty, Diaz has been beset with arm troubles for some time now. Tommy John surgery cost him all of 2016 and he has experienced forearm problems at the outset of the current campaign. As a result, he has turned in just thirty appearances at any level since the conclusion of the 2015 season.
The Rox designated and released Diaz recently, but he evidently did not find better opportunities elsewhere and decided to return on a new contract. When healthy, Diaz boasts an upper-nineties heater and typically generates quite a few groundballs, so he could be an intriguing asset for the Colorado organization if he’s able to get back on track.