STILLWATER — Zac Robinson is expected to start at quarterback for Oklahoma State in the 2010 Cotton Bowl against Mississippi at Cowboys Stadium in Arlington, Texas. As of Tuesday, Brandon Weeden is the favorite to start at quarterback in OSU’s 2010 season opener. "Weeden is our next guy,” Gundy said on Tuesday. "As of now, (Weeden would start). He’s earned the right to be our second-team quarterback.” Which makes him next in line to start for the Cowboys in 2010. Gundy said natural progression dictates that Weeden is the favorite to be the Cowboys’ starter next season, but the eight months between the Cotton Bowl and OSU’s 2010 opener will be filled with off-season workouts, spring football and fall camp. And Gundy made it clear that it would be an open competition to replace Robinson in 2010. Gundy didn’t rule out the possibility of a newcomer starting, but noted it would be extremely difficult for a first-year player to win the job. "Anybody else that comes in has the right (i.e. opportunity) to beat him out,” he said. "It’s difficult, but it could happen.” Sand Springs quarterback and OSU commitment Johnny Deaton expects to enroll early and join the Cowboys for spring football. Fellow quarterback recruit Nathan Sorenson of Texarkana, Texas, will likely join the open competition to replace Robinson in the fall. Junior Alex Cate and redshirt freshman Clint Chelf also will compete for the job.