at all divisions mens and womens kids change majors to continue playing. many kids enroll in athletic training and pre physical therapy programs as well as engineering. those are impossible for athletes. practice for teams is in the afternoon. can't be at lax practice and also working for another team as a student trainer. can't be in engineer or pre med labs in the afternoon when you have practice. plain and simple. yes many never play 4 years because playing is a full time job and working is not as much fun as playing because you love it. When not a star or regularly seeing the field the 6am runs and 2 workouts a day aren't so enjoyable.