I grew up playing hockey. Haven't played (competitively) in a long time. 37 years old now and I'm sure the old body can't hold up to it any more.
Glutamine year round shouldn't hurt...helps in recovery from major muscle stimulation.
Supplements you forgot...when I was playing, I liked to serve up my opponents a steaming hot cup of "SHUT THE F*** UP!" Always made me feel better. When that doesn't work, try a nice ice-cold "KISS MY FRIGGIN A**!" or a healthy serving of "DAMN YOUR CHICK IS FLEXIBLE!"
It's good to test the reality level of people sometimes. Gets the endorphins flowing.