Chafin (shoulder) began a rehab assignment with Triple-A Reno on Thursday.
Chafin was shut down for a couple weeks after tweaking his groin last time he attempted to kick off a rehab assignment, but he is ready to return to game action. It's not clear how many times he will throw in the minors, but he is on track to rejoin the big club at some point in early-to-mid- September.