Clark, who is 6-foot-3 and 230 pounds, is ranked No. 188 in the Scout 300 and has been a firm commitment to LSU since deciding in late June.
But the Sooners have never given up hope. And six weeks ago OU defensive line coach Jerry Montgomery made the first move by starting to communicate more with Clark's mother, Dorshell, who has taken an active role in all of her sons' recruitments.
"It was an honor to have Coach Stoops in my living room," Clark said. "It definitely helped a lot and answered some questions."
The questions aren't necessarily from Deondre but from Dorshell. The Clark family had built up a quality relationship with former OU defensive line coach Jackie Shipp back when the Sooners were near the top for Clark.
Shipp was let go by Stoops in February and found a home at Arizona State. Despite attempts by Montgomery in the spring to get back in the mix, it seemed like the damage was done.
Clark grew up an LSU fan and nobody was shocked when he pledged to the Tigers in the summer. And there has been nothing done on LSU's end, Clark said, to have him looking elsewhere.
"My relationship with the LSU coaches is great," Clark said. "We're looking to have our visit soon. I definitely want to go back."
Clark's senior season ended last week, and he is getting ready for the Semper Fi all-star game later this month. He said after that event, he wants to visit LSU and some other schools are on his mind.
Clark followed a great junior season with another superb season this fall. He was used as a running back a lot more this year, almost never taking a break.
He rushed for 1,365 yards on 160 carries with 21 touchdowns. He also registered more than 50 tackles and had 18 sacks.
The visit with Stoops definitely left an impression.
"I got a lot of one-on-one time with him during the summer, but it was good to relax and get to know him better," Clark said. "He is a lot more laid back than I thought he would be."