WATCH: Matthews mocks Kaepernick by stealing celebration after sack

Linebacker Clay Matthews didn't feel bad about sacking quarterback Colin Kaepernick during the Green Bay Packers' 17-3 win over the San Francisco 49ers in Week 4. Kaepernick has run and passed all over Green Bay's defense in the past, as he knocked the Packers out of the playoffs in back-to-back years (2012, 2013).

So when Matthews finally brought Kaepernick down in the second half of Sunday's action, he took a moment to rub it in. Watch Matthews mock Kaepernick's famous touchdown celebration, courtesy of this video from the NFL's official Twitter account.

Matthews has been a man on a mission this season. He's playing inside and outside linebacker; the Packers are asking him to stuff the run, rush the passer and drop into coverage. And he's doing it all incredibly well.

Through four games, Matthews has 14 tackles, three sacks and an interception.

MORE NEWS: Want stories delivered to you? Sign up for our NFL newsletters.