This only documents his injuries up to when he broke his foot prior to last season. It wasn't supposed to result in him missing time during the season but it turned out that his foot was never really right last year. He struggled through camp and preseason and tried to play the first two weeks of the season but was eventually put on IR and missed the next 8 weeks. There was a lot of debate whether he would need a second surgery at the time but they ultimately chose to go the route of more rest and rehab. When he finally returned, he was questionable for pretty much every game the rest of the way and was still experiencing issues into last off season.
Anyway, here's the full list of his injuries up to that point:
Watkins' growing list of injuries