At Alcoa, all football players are required to take the Weight Training class. Other sports aren't required but most coaches like them to take the class. Although in basketball I don't think it should affect the shot too much, baseball is very different. If your arms become too big it decreases the extension you have when throwing the ball, making it harder to throw it faster and harder.
Not working out at all though, in any sport puts the team at a disadvantage from other schools.