Markell Martin, a three-star safety and wide receiver from Rider High School in Wichita Falls, Texas, decommitted from Texas A&M and gave a verbal to OU on Monday.
Martin had committed to the Aggies in February, but cited the recent coaching change and a desire to be closer to home in his decision.
The 6-foot-3, 180-pounder made the decision without stepping foot on campus.
Rider is currently 12-1 and in the midst of the Texas high school playoffs. He said he'll make an official visit when the playoffs are finished.
Scott Ponder, Rider High School head coach, wasn't quite ready to confirm his player's decision on Tuesday.
"He's opened up the recruiting process right now and he's very interested in Oklahoma," Ponder said.
Martin, who boasts 4.4 speed, has nearly 70 tackles, three interceptions and a sack so far this season.
As a junior, Martin had 81 tackles and five picks, two of which he returned for interceptions.
He initially committed to Texas A&M after attending the Aggies' Junior Day on Feb. 3.