Jacob deGrom Halts Throwing Due To Forearm Tightness Mets ace Jacob deGrom has been dealing with tightness in his right forearm and has been shut down until the discomfort subsides. Manager Luis Rojas told Deesha Thosar of The New York Daily News (Twitterlinks), SNY’s Steve Gelbs, and other reporters that an MRI didn’t reveal any structural damage to deGrom’s forearm. The problem existed prior the All-Star break, as Rojas said deGrom felt tightness while throwing a bullpen session last weekend. The forearm tightness continued during a side session on Friday, so the Mets opted to halt deGrom’s throwing so further testing could be done. No mention was made of the injured list, though an IL stint seems inevitable considering that the Mets will surely take every precaution in making sure deGrom is fully healthy.