Strange's original knee injury caused him to miss all but the first week of training camp. He was listed on the injury/practice reports for the first 7 weeks, missing 4 of those games. And he clearly struggled when he did play. His play had improved markedly over the past few weeks, both by the metrics and the eye test (comments from those that hated the draft pick notwithstanding), and even Belichick noted his improved play yesterday. Tough break, as sometimes the recovery from these late season knee surgeries end up forcing the player to miss mini-camp and even parts of training camp.