In 2005, Pettijohn had his most productive season of his career, finishing with career-highs in carries (57), rushing yards (212), touchdowns (eight), tackles (45.0), sacks (5.5), tackles for losses (6.5) and fumble recoveries (three). He was named to the All-Ironman team after setting single-season franchise records for rushes and rushing yards. He holds the team's all-time longest rush, a 37-yard touchdown, and moved into second place in team history with 286 rushing yards. He led the team and doubled his previous season high with 5.0 sacks and also doubled his all-time career totals in tackles for losses with 6.5.
