It's probably a good thing the 49ers and Raiders only play each other once every four years because if Colin Kaeperick and Sio Moore saw each other more often than that, things would probably get ugly.
During halftime on Sunday, the Raiders linebacker was one of the first players into the tunnel. However, instead of going into Oakland's locker room, Moore stayed in the tunnel and it looked like he did that because he was specifically waiting for Kaepernick.
Once Kaepernick entered the tunnel, Moore went up to him and kept saying, "I'm good. I'm good."
Kaepernick then responded with, "I hope you are. I'm coming for you."
Moore then followed that up by calling Kaepernick a "Bitch ass mother f----r."
The trash-talking didn't stop at halftime either. A few hours after Oakland's 24-13 win, the Raiders linebacker took to Instagram and flat-out called Kaepernick a chump.
Moore also took to Twitter and retweeted this after the game.
Although the Raiders won and Moore tackled Kaepernick for the seven-yard loss above, Moore didn't do much else. Six of Kaepernick's 18 completions in the game went Moore's way.
Here's the video from the Kaepernick-Moore exchange (via TMZ.com).