Chuck Neinas will take over the Big 12 as interim commissioner on Oct. 3. The Big 12 dumped former commissioner Dan Beebe on Thursday in a mutual agreement after the conference nearly fell apart for the second time in 15 months. "I am not a caretaker. My mission is to bring the conference closer together and move forward and make progress in all areas," Neinas said, adding he expects to be on the job six months or longer.