Complex sentence: He had initially signed to play college basketball at the University of Oklahoma for head coach Kelvin Sampson but when Sampson took the head coaching position at Indiana University, the administration at OU released James from his letter of intent and he switched his decision to Texas.
Split into simpler sentences: He had initially signed to play college basketball at the University of Oklahoma for head coach Kelvin Sampson. When Sampson took the head coaching position at the Indiana University the administration at OU released James from his letter of intent and he switched his decision to Texas.