It was thought that Chubb would enter the 2017 NFL Draft, but he decided to return in 2017 for his senior season with the Bulldogs. During his senior campaign, Chubb split carries with Sony Michel, but still managed to amass 1,345 yards on 223 carries (6.0 average) with 15 touchdowns. The two led Georgia to a 12–1 record and an SEC title. In a double-overtime victory over Oklahoma in the Rose Bowl in the College Football Playoff semifinal, Chubb had 145 yards on 14 carries, including a 50-yard touchdown just after halftime and a game-tying 2-yard run in the last minute of regulation. (Previously that season, Chubb eclipsed 125 yards and two touchdowns three other times: against Samford, Vanderbilt, and Kentucky.) In the national championship game, Alabama's suffocating defense held Chubb to just 25 yards on 18 carries in the 26–23 overtime loss.