[1][2] In 2011, Peterson was named Oklahoma's Defensive Player of the Year by The Oklahoman and also earned SuperPrep All-American honors.
In 2015, Peterson was a Jim Thorpe Award semifinalst, earned First-team All-Big 12 Conference honors and was named a team captain.
[9] Lance Zierlein of NFL.com predicted that he would be drafted in the sixth or seventh round, stating "Size limitations make a move inside as a nickel corner possible, but he has enough quickness and coverage savvy to stick on a roster.
[19] On August 11, 2018, Peterson was placed on injured reserve after he suffered a torn ACL in the Rams' first preseason game.
[20] Without Peterson, the Rams reached Super Bowl LIII where they lost 13–3 to the New England Patriots.
[25] He was activated on December 12, 2020,[26] and finished the year with six tackles, one pass defended, and a recovered fumble in 12 games.
In the 2021 season, Peterson played primarily on special teams, finishing the year with eight tackles in four games.