Rien Michael Long (born August 7, 1983) is a former American college and professional football player who was a defensive tackle in the National Football League (NFL) for three seasons during the early 2000s. He played college football for Washington State University, earned All-American honors, and was recognized as the top college interior lineman. The Tennessee Titans chose him in the fourth round of the 2003 NFL Draft, and he played for the Titans until his pro career was cut short by injuries.