A protégé of “The Ultimate Fighter” Season 4 winner Travis Lutter, Walker has secured all nine of his victories by submission and owns 36-, 37- and 60-second wins. The 26-year-old Mineral Wells, Texas, native last appeared in November, when he succumbed to first-round punches against the once-beaten Mikel Bronzoulis at a Steele Cage MMA event in Frisco, Texas. Walker has yet to go the distance in 13 professional bouts.