My knowledge is limited, but when I heard he was going through tendonitis, I read articles about athletes, musicians, artists, etc. suffering from it, anywhere from weeks to months, to multiple years.
I recall in the early phase, rest and support is needed to avoid damage, and to stop the movement or the activity that caused it. For some people it becomes chronic.
Won't get into my opinions on Petey and his terrible on ice play, but wouldn't be surprised if it was an issue, due to playing through it for months.