He had one major arm issue, resulting in Tommy John back in 2015. That caused him to miss all of that season plus a portion of 2016 recovering. His velocity has actually improved after he returned from surgery, from 93.4 MPH in 2014 to 94.7 MPH in 2017. Besides the Tommy John, he's been durable a la Ervin, so I'm not that concerned about him being 31 years old. He should have 3 more good seasons in him at least. Now, it's still not certain whether this is realistic so I'm holding back from future heartbreak.... If this is truly realistic, I'd be ecstatic.