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!
We also have one on In Season Part 2 Days,Sets and Reps.
I hope these help and, generate some great forum discussion!