Justin Fields threw for four touchdowns, J.K. Dobbins rushed for 121 yards and the Buckeyes pounded Northwestern 52-3 on Friday night.

Ohio State (7-0, 4-0 Big Ten) did exactly as expected and blew the game open early, jumping to a 31-3 halftime lead.

Fields completed 18 of 23 passes for 194 yards. The sophomore transfer from Georgia matched his career high for TDs through the air. He now has 22 passing and 30 overall on the season.

The nation’s second-leading rusher, Dobbins scored from the 5 in the second quarter after breaking off a 67-yard run. He also caught a 19-yard touchdown pass in the first half.

The junior now has 947 yards rushing after finishing with more than 1,000 in each of his first two seasons.Chris Olave caught two TDs. Blake Haubeil kicked a 55-yard field goal that tied the second-longest in the history of the storied program. The Buckeyes racked up 480 yards while holding the Northwestern to 199 and remained unbeaten heading into their showdown at home  Wisconsin next week.