He might throw across his body a little, but I agree, his mechanics are certainly pretty clean looking. And he isn’t a max efort guy, so it seems odd for him to have constant injury problems. Not much video I could find on him and it’s hard to analyze at game speed.

It’s an inflamed nerve that’s a fairly common injury from any sort of repetitive throwing motion – essentially, it’s the elbow equivalent of carpal tunnel syndrome. Immobilizing it at night and taking an anti-inflammatory (ibuprofen or naproxen, for example) should cure it if it’s minor. If it’s major, there’s an out-patient surgery to decompress the nerve and shave the elbow to enlarge the cubital tunnel. For someone who wasn’t an athlete, the first stage (immobilizating & anti-inflammatory) would be done for 4-6 weeks before determining if surgery is needed. It will probably go quicker for Bastardo. If the surgery is needed, recovery is generally around 8-12 weeks. That would put the total time out at 12-18 weeks for a non-athlete.

And honestly, the shoulder problem could have caused this. A fair number of ulnar neuritis cases come when a shoulder injury makes someone change arm motions, trapping the nerve behind the knob of the elbow.