2010-11 – Indoor: As a true freshman, Collin finished second in the 200 at the Husky Classic with a time of 23.47. He was also part of the first-place distance medley team at the UW  Invitational, where they ran with a time of 10:06.28. Outdoor: Placed fourth at the WAR-4 in the 400 with a time of 49.24.

High School - Green placed third in the 400 meters at the State 3A Championships his senior year, running his career best of 49.84.