Christian McCaffrey took it in for the short touchdown after the big gain by JJ Arcega-Whiteside to put Stanford up 38-24:
This was McCaffrey's second consecutive game with three or touchdowns, thanks in part to him cementing himself as the short yardage and goal line back. One big criticism of McCaffrey during his Heisman runner-up campaign was that he didn't score enough touchdowns, and that Remound Wright was the back trusted on the goal line. This year, now it's McCaffrey who's taking in the ball for touchdowns.
McCaffrey is up to 269 rushing yards (both a Big Game record and a Stanford record), and since the game is still close, it's very possible that McCaffrey will eclipse 300 yards in the game. He also reached 2,000 all-purpose yards for the second season, becoming the first Stanford player to reach that mark.