This is one parting gift Stanford won’t soon forget.

In the last Pac-12 matchup between longtime conference rivals, No. 6 USC hammered Stanford, 56-10, sending the Cardinal into the ACC with its largest margin of defeat in the series since a 42-0 drubbing in 2006. With a spot in the Big Ten waiting next season, the Trojans (3-0, 1-0 Pac-12 Conference) had their best scoring night in the rivalry since hanging 51 on the Cardinal in 2005.

It was the most points USC has ever scored against Stanford and the 46-point differential marked the Trojans’ biggest win over the Cardinal since 1977 (49-0).

While the Trojans kept Stanford’s new-look offense under first-year head coach Troy Taylor out of the end zone until the 3:35 mark of the fourth quarter, quarterback Caleb Williams continued his early season dominance. The junior threw for 300 yards and three touchdowns on 19-for-22 passing. Through three games, Williams has led 25 drives that resulted in 18 touchdowns.

On Saturday, the Heisman winner just kept making magical plays look routine. He did it on the ground, rushing 21 yards while bulldozing a Stanford defender at the goal line for USC’s opening touchdown. He did it through the air, throwing a perfect pass 65 yards that hit a sprinting Brenden Rice in stride for a 75-yard touchdown. And he did it off script, dancing in the pocket for six seconds until he scrambled to his right and fired a 19-yard touchdown strike to a crossing Dorian Singer.

Then he went to the sideline.

With a comfortable 49-3 lead, Williams stepped aside for the entire second half as backup Miller Moss appeared in his third consecutive blowout win. Moss scored on a 15-yard run in the final minute to close out the scoring.

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