COLUMBIA, Mo. --  Brady Cook returned from an injury to lead No. 19 Missouri to two fourth-quarter touchdowns, including the go-ahead run by Jamal Roberts with 46 seconds to go, as the Tigers escaped with a 21-17 victory over Auburn on Saturday. Cook appeared to hurt his ankle on the opening series and did not return until late in the third quarter, by which point Auburn had taken a 17-3 lead. But he promptly hit Theo Wease Jr. with a 72-yard pass to set up Marcus Carroll's touchdown run, then led an even more dramatic drive with time running out in the fourth quarter. Missouri (6-1, 2-1 SEC) took over at its own 5-yard line with 4:26 to go. Cook converted one third down with his legs, then hit Luther Burden III on fourth-and-5 for another first down. He hit Wease later in the drive on third-and-10 and found Mekhi Miller inside the 10-yard line with just over a minute to go, setting up Roberts' touchdown run. Cook...