Updated

Green Bay linebacker Clay Matthews was fined $15,000 for a hit on San Francisco quarterback Colin Kaepernick during the teams' season-opening game.

According to the NFL, Matthews was fined "for striking an opponent late."

Matthews drew a personal-foul penalty in the 49ers' 34-28 win Sunday after he tackled Kaepernick out of bounds deep in Green Bay territory in the second quarter.

A fracas between players from both teams followed on the sideline when Matthews and 49ers left tackle Joe Staley began pushing and shoving.