Nobody actyally knows what the summer workout plan was or who suggested to him that the best way to get over tendinitis is rest. It may very well be team Doctors.
At the end of the day tho, its clear that injury, and lack of-offseason training is why we are seeing what we are seeing wit EP40. Obviously confidence plays a roll in that once everything started snowballing.
Media got months of content and clicks though trying to make it sound like EP40 was struggling cuz of Miller.
A perspective... More than one thing can be true at once.
It is absolutely possible that he didn't train well in the summer over fears of making the tendinitis worse AND that Miller was causing him problems. Not sure why this is a hard thing to understand for either the media or us fans.
As for the "injury," tendinitis can be an overuse issue, but it also is a strength and range of motion issue. Pretty sure that most professionals would say the acute suggested response is actually rest and then the next response would be strength and range of motion-like movement exercises. I am not sure of any professional who would not first say, it wont get better if you keep stressing the inflammation. That kind of means rest at first, with some treatments and then step 2.
However, I would think that in a case like this, it is not so clear as don't train at all, it would just be a case of not continuing to inflame the knee. This should not have stopped him from gaining muscle mass in other areas, doing a great deal of upper body strength things or shooting/handling a lot of pucks, none of which it would appear he did enough of, from his performance or appearance.
Next, the question of in season strength training is not black and white. No doubt, it is harder to gain strength in season, due to the workload and recovery time needed to maximizing game to game performance. However, at some point, the team and Petey himself would need to consider if maximizing his game to game performance, short term, should have been the focus. Maybe it should have been a focus to forgo short term performance and focus on his longer term performance and recovery, meaning more reps in the gym and less on the ice in order to get him up to speed within a period of time. And for all we know, they have been doing just that. I guess, I am saying, although not optimal, it isn't a black and white issue of don't train in season- it would be more of a case of not traditional optimal performance periodization.