He signed with the Cowboys last February and is listed as a defensive back in the 2009 OSU Media Guide.
OSU head coach Mike Gundy would only say Monday night following the Cowboys' practice that there may be a problem with Mitchell's eligibility, and that he may have to return home to take care of some classwork before rejoining the OSU football team in January.
Gundy also said that he is attempting to get more information, but that will come from the Katy ISD or Morton Ranch High School officials.
The investigation into the Morton Ranch football program began last Friday when school district administrators were made aware of allegations involving three of the teams coaches, including head coach Scott Svendsen, offensive coordinator Jeremy Orsagh, and defensive coordinator Cody Haug, according to a Houston Chronicle report. The three coaches have been placed on administrative leave by the school district.
The allegations are that the three coaches were violating district policies regarding student records, possible misuse of funds, and athletic eligibility, according to the Houston Chronicle.
Mitchell was originally expected to enroll at Oklahoma State at mid-term last January but he did not graduate from Morton Ranch High School early and waited to enroll this summer.
"He may sit out tomorrow," said Gundy of Robinson. "He doesn't feel right and he's had this before. This isn't the first time he's had this and there is no reason for us to put him in.
"I think it is really good for us anyway because it gives the other guys a chance to take over the offense. They (Brandon Weeden and Alex Cate) are playing pretty well. They miss some throws, but overall, they handle the offense fairly well which is important. They are both better."
Gundy added that star linebacker Deron Fontenot suffered a dislocated big toe and has a boot on. He will miss time. Third team center Casey LaBrue also has a boot on his foot.
Running back Kye Staley was also held out of Monday's practice. Gundy said Staley got dinged when he had a big collision with linebacker Tolu Moala. Staley is expected back soon to continue what has been a strong preseason camp.
"I like the way we are running to the ball and tackling. I like to watch our safeties tackle. I like watching Lucien. I like watching Johnny, and I like watching Vic. You know Victor has a green jersey on for another week because of that little scope (surgery) he had on his shoulder, and he is tackling with it. He's like a guy breaking rules in the military that is wearing a cross and pulls out a gun. He's been using that our here to his advantage. He's walking around and I'm teasing him that he's got that red cross deal on and he's pulling out a gun on our guys."
"There is a chance he can play, sure is a chance that he could play," said Gundy of Moore. "Both Union players (also running back Jeremy Smith) are doing good. Michael Harrison is doing good. Moore is big and he has very soft hands. It will be interesting to see how he holds up when we really start hitting. His ability to absorb information has been very good.
"He made two big plays yesterday and I sang 'Hail to the Titans' to him which is the fight song at Carl Albert," said Gundy of Lowe. "I know that song because my wife sings that around the house some, so I sang that to him and he got a big kick out of it. He has made several plays.
"his is a good freshman class and there are some good players in this class. It is good to see them show up and they are meshing well and taking care of each other and doing all the important things."