All you need are two workouts per week. You can do a similar workout to what Joe DeFranco recommends for his in-season football players.
The first session is a day after a game and is more of a "lighter" full-body workout (2-3 sets of 8-12 reps) and the second session is heavier to focus on keeping your strength gains (2-3 sets of 4-6 reps). The workouts should take less than 45 minutes. Choose one exercise per bodypart and go to his site for the workout he prescribed.