SANTA CLARA -- The sun set over Levi's Stadium at 6:42 p.m. PT on Monday, but that wasn't the biggest source of shade.
49ers rookie edge rusher Nick Bosa pressured Cleveland Browns quarterback Baker Mayfield into a first half-ending intentional grounding penalty, and celebrated by pulling a page out of Mayfield's playbook.
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During his Heisman Trophy-winning season in 2017, Mayfield planted an Oklahoma Sooners flag on Ohio State's home turf. Bosa, then a Buckeye, lined up opposite Mayfield that night when the Sooners left Ohio Stadium with a 31-16 win.
Bosa, apparently, remembered the celebration very well.
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The 49ers sacked Mayfield three times and had seven QB hits in the first half. Bosa finished with two sacks, a forced fumble, and a fumble recovery in the 49ers' 31-3 win.
But Bosa wasn't done. After the game, the 49ers rookie did the celebration again -- but this time, with a real flag.
Game. Set. Match.