1. Train Like An Athlete, Not Like A Bodybuilder.
This is probably one of the biggest causes of decreased performance on the field. Size is important in athletics, but definitely not as important as strength and explosiveness. If you can generate the same amount of (insert athletic quality) at a bodyweight of 180 lbs. as someone who weighs 200 lbs, wouldn't that be an advantage?
You may have the biggest biceps on the team, but does that translate to on-field success? Definitely not. If you have been training with high rep sets with a low percentage of your 1 rep max, it is probably a good time to drop the reps and increase the load. Use compound lifts such as squats, deadlifts, bench presses, and good mornings.
Isolation should only be used in a prehabilitative sense, strengthening problem areas such as the shoulder, hips/hamstrings, and core. The rep should have a moderately slow eccentric phase (lowering of the bar) and a fast concentric (lifting of the bar) phase to maximize muscle tension.
This may be hard to accept for an athlete, as you can't see strength in a mirror like you can see muscle hypertrophy. Even though qualities like limit strength and speed strength are used to efficiently train the nervous system, they can have an effect on muscle hypertrophy, so it can appeal to your vanity side.
1 Rep Max Calculator