Nick Bosa is just a rookie, but on Monday night, he showed why the San Francisco 49ers took him with the second overall pick of the NFL Draft back in April.

During the 49ers' blowout win over the Cleveland Browns, Bosa logged four tackles, a couple of sacks, a forced fumble and a fumble recovery, becoming the first Niner to post that type of stat line in 25 years, according to Nick Wagoner of ESPN.

Bosa also had a little something for Browns quarterback Baker Mayfield after the game, as he planted a 49ers flag in the end zone following the 31-3 victory.

The gesture was payback for something that happened while Bosa was at Ohio State in 2017, when Mayfield staked a Sooners flag at Ohio State's midfield after Oklahoma picked up a road win against the Buckeyes.

San Francisco's defense harassed Mayfield all night, leading to what was probably his worst game as a pro, as he completed just eight of his 22 passes for 100 yards and a pair of interceptions.

Obviously, Bosa's performance was a big reason for that, and as a team, the 49ers finished with four sacks and forced four turnovers. They also held the Browns to just 180 yards of total offense and made them go 1-of-11 on third downs.

The Niners improved to a surprising 4-0 with the win, maintaining their grasp on sole possession of first place in the NFC West. They will now head on the road for a divisional clash with the Los Angeles Rams next weekend.