A few surprises brewing around the Big 12

Posted by ESPN.com's Tim Griffin

Oklahoma State was expected to have a difficult test today at Kyle Field against Texas A&M.

Kansas was presumed to have a cakewalk at home against Iowa State.

Both favorites are struggling in the Big 12's early games.

Texas A&M has rebounded from some early struggles to claim a 8-7 lead over Oklahoma State.

And Kansas has reclaimed a 13-12 lead over Iowa State.

Kansas desperately needs a victory to keep up with Nebraska in the Big 12 North. And they are doing it without Jake Sharp, who again missed a start with that nagging injury.

Oklahoma State is playing without Dez Bryant, who was left at home after he was indefinitely suspended by the NCAA.

Zac Robinson appears to have missed his top receiver as he's completed only 4 of 11 passes to start off.

Texas A&M produced only 21 yards on its first three possessions. But the Aggies have been more consistent, taking the lead when holder Ryan Tannehill bobbled the snap but still scrambled to make the end zone.

The favored teams need to step up after the tougher-than-expected early challenges.