The Oklahoma Sooners submitted Baker Mayfield's appeal to the NCAA on Thursday in hopes the quarterback can be eligible this season, his attorney Jim Darnell said.

A freshman walk-on quarterback at Texas Tech last season, Mayfield said he decided to leave Tech when he was told he wouldn't be put on scholarship. Mayfield enrolled at Oklahoma in the spring but is appealing the transfer rule -- supported by Tech -- that requires him to sit out a season before he is eligible.

Mayfield was the first freshman walk-on quarterback to start at a BCS school, but Mayfield said Texas Tech would not guarantee him a scholarship for the 2014 season, prompting him to leave.

Mayfield's family hired Darnell, who represented former Texas A&M Aggies quarterback Johnny Manziel last season in his eligibility issues with the NCAA.

Texas Tech repeatedly blocked Mayfield's request to allow Oklahoma to put him on scholarship before July 1, Darnell said. If Mayfield's transfer was approved by Tech, he would have been eligible this season at OU, Darnell said.

"But they blocked it," Darnell said. "It surprised me some. I'd like to think they weren't (vindictive), but I don't know."

Darnell hopes to have a response from the NCAA before OU's Aug. 30 season opener against Louisiana Tech.

At last month's Big 12 media days, Texas Tech coach Kliff Kingsbury and Oklahoma coach Bob Stoops both addressed Mayfield's situation.

Kingsbury said Tech blocked the transfer, requiring Mayfield to sit out this season, because it was "team policy. That's it. The NCAA has the in-conference policy for a reason.

"To have a walk-on kid win Big 12 freshman of the year and then he leaves and there is a negative spin to it, it is tough," Kingsbury said. "I wish him well and I'm still proud of what we did there and I'll be proud watching him moving forward in every game except for one."

Stoops questioned why Mayfield, a walk-on at Tech, would not be allowed to be eligible immediately at another school.

"I think it's one thing if you've invested a scholarship in an individual and he decides to leave, heck, they even half the time allow them to play immediately," Stoops said. "But a guy, that you haven't invested a scholarship in, I don't know why that would even be something.

"Why would that be an issue?"

Added Darnell: "Tech has a pretty good reputation for taking care of their players. If they had invested a scholarship in the kid, that would make sense. But this kid appeared out of nowhere (as a walk-on)."

Last year Mayfield was named Big 12 offensive freshman of the year after throwing for 2,315 yards and 12 touchdowns. If Mayfield, a sophomore, is eligible at Oklahoma this fall, he's expected to be the back-up to starter Trevor Knight.

"I wish Tech would do the right thing," Darnell said. "I think they're flying in the face of everything a university stands for. They're supposed to do the right thing for students and this is punishing a family and a student that did nothing but good things for Texas Tech.

"They're punishing him to tune of over $42,000 in tuition (to attend Texas Tech and Oklahoma as a walk-on). It's costing him a pretty penny."

Information from The Associated Press was used in this report.