Redshirt, in United States college athletics, is a delay or suspension of an athlete's participation in order to lengthen their period of eligibility. Typically, a student's athletic eligibility in a given sport is four seasons, aligning with the four years of academic classes typically required to earn a bachelor's degree at an American college or university. However, in a redshirt year, student athletes may attend classes at the college or university, practice with an athletic team, and "suit up" (wear a team uniform) for play – but they may compete in only a limited number of games (see "" section). Using this mechanism, a student athlete has at most five academic years to use the four years of eligibility, thus becoming what is termed a fifth-year senior.