Gus Malzahn reportedly told a recruit that he wanted a coach similar to departed defensive backs coach Wesley McGriff: a veteran with lots of experience. He definitely found that in Missouri cornerbacks coach Greg Brown.
Brown's career started all the way back in 1981 and he's had stints in both college and the NFL. He's spent the last few seasons at Alabama as a secondary coach in 2013 (which means he was on the other side of the Kick Six), Louisville (where he would have coached against Auburn in 2015), and then coaching cornerbacks at Mizzou this season under first-year coach Barry Odom.