During the season, the emphasis was on mobility & active recovery. Nobody gets stronger in season, and it's simply a race to stay healthy and maintain weight/strength.
Offseason, I really like 5/3/1 for this age of athletes, with plyos mixed in as accessory work. I've had luck trimming it to 3 days, and putting in a minimum of 2 speed, positional, and/or explosiveness drills.
Training injuries were/are very infrequent.
If I knew 20 years ago what I know now, I would've eaten & squatted more.