In season training is about to become a hot topic as we move from summer to fall. Here are some links to some in season training articles.
The One Dumbbell In- Season Workout- this is one of my favorites as it can be done with minimal equipment almost anywhere.
In Season Training- Something is Better Than Nothing - this is an old article so the videos are in flash but no longer work but I still believe in the concept. DO SOMETHING!
Here's another on In Season Training for Football and one on The Myth of In Season Maintenance by Ben Bruno.
We also have one on In Season Part 2 Days,Sets and Reps.
I hope these help and, generate some great forum discussion!