Posted by: Chris Vannini on February 12, 2013

After a more than a decade of coaching stability and success, Bob Stoops is starting to shake things up.

On Monday, it was announced that offensive line coach James Patton would not return to OU and took a job at Indiana. Now, sources tell CoachingSearch.com that defensive line coach Jackie Shipp will not return next season.

Shipp had been on the staff at Oklahoma since Stoops arrived in 1999.

Although Oklahoma has won 10 games in each of the past two years, it's the first two-year stretch in the Stoops era that OU hasn't reached a BCS game. They won the Insight Bowl in 2011, but lost this year's Cotton Bowl to former conference rival Texas A&M.

In 2011, the Sooners went 6-3 in Big 12 play, while rival Oklahoma State won the conference and the Fiesta Bowl. In 2012, they tied for the conference crown with Kansas State, but lost home games to the Wildcats and Notre Dame.

Is there something missing from this? Texas.

Oklahoma's struggles aren't even coming at the expense of the Longhorns. Although OU has won three straight in the Red River Rivalry, the Sooners are struggling in other places.

Now, Bob Stoops is doing something a bit out of character to turn things around.

Stay tuned to the Coaching Search Ticker for the latest.

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Chris Vannini is the lead writer for CoachingSearch.com and has covered Michigan State sports for The State News, The Oakland Press and MLive.com. He writes a weekly column for the Detroit Free Press on behalf of SB Nation. Vannini lives in Big Ten country, so his foot speed is far from SEC caliber, but his pulse on coaches is hard to match. Be sure to follow @CoachingBuzz on twitter and send your feedback to chris@coachingsearch.com