Oklahoma football: Jamarkus McFarland wants to leave his mark on Red River Rivalry - Article Photos 4/16

UT's David Ash (14) fumbles the ball as he is brought down by Ronnell Lewis (56) of OU in the second half during the Red River Rivalry college football game between the University of Oklahoma Sooners (OU) and the University of Texas Longhorns (UT) at the Cotton Bowl in Dallas, Saturday, Oct. 8, 2011. OU won, 55-17. Photo by Nate Billings, The Oklahoman