Patrick Chung of the New England Patriots suffered a forearm fracture during the Super Bowl, and he is set to undergo surgery this week. This will involve placing plates and screws across the bones to allow them to heal in the proper position. This could be something similar to an injury that Rob Gronkowski had several years ago, but all of the details are not available.
A few weeks later he will also have surgery to address a shoulder problem that he had been dealing with throughout the season. This is most likely a partial or complete injury to the labrum in the shoulder or the rotator cuff. These tend to be injuries that athletes can play through with some pain and address in the off season.
Regardless, he is expected to miss the OTAs and be back for training camp.