FAYETTEVILLE — Kamryn Pettway rushed for 90 yards and three touchdowns and No. 21 Auburn bounced back from a loss to LSU with a 52-20 victory over Arkansas on Saturday night. The rushing yards are the most for Pettway since he gained 128 in a win last month over Mercer, and the Tigers (6-2, 4-1 Southeastern Conference) rushed for 345 yards overall. They outgained the Razorbacks 629-334 and have outscored their SEC West counterpart 108-23 over the last two seasons. Jarrett Stidham completed 19 of 28 passes for 218 yards and rushed for a touchdown for Auburn. Arkansas freshman Cole Kelley, making his second straight start in place of the injured Austin Allen, finished 14-of-25 passing for 138 yards. The Razorbacks have lost seven of their last nine games dating to last season and are 27-31 overall under fifth-year coach Bret Bielema, 10-26 in the SEC. THE TAKEAWAY AUBURN: Running back Kerryon Johnson entered the game as the national leader in rushing touchdowns with 13. The junior added to his total with a two-yard score in the first half and finished with 63 yards rushing on 21 carries, and he and Pettway combined for 153 yards rushing on the night — a welcomed sign for a Tigers team that must win out if it hopes to keep its remote chances at a berth in the College Football Playoff alive. ARKANSAS: The Razorbacks have scored 29 points in their last two games without Allen, their worst two-week stretch in back-to-back losses since scoring a combined seven points in losses South