Oakland Raiders owner Mark Davis might understand his defensive coordinator's thought process, but it does not mean he endorses what Jason Tarver was caught doing in his team's eventual 21-18 victory over the Pittsburgh Steelers. And Tarver himself issued a mea culpa for his actions.

Raiders defensive coordinator Jason Tarver apologized Monday for his gestures directed toward officials in Sunday's game. Kyle Terada/USA TODAY Sports

Tarver flipped a middle finger, on separate occasions, at the officials after a personal foul was called on cornerback Mike Jenkins for a helmet-to-helmet hit on Steelers running back Le'Veon Bell with 8:48 left in the third quarter.

"It was just an emotional outburst by a coach in the heat of the game," Davis told ESPN.com. "We don't condone those actions and we'll handle it in-house."

Tarver, meanwhile, issued his apology in a statement Monday afternoon.

"I apologize for my action on the sideline of yesterday's game," Tarver said in the release. "It was in the heat of the moment, and I regret drawing attention away from the Raiders players and what they accomplished."

The flag, by the way, was picked up and no penalty was levied after all.

The Raiders, not the NFL, are expected to impose discipline on Tarver, league sources told ESPN NFL Insider Adam Schefter.

In 2010, Tennessee Titans defensive coordinator Chuck Cecil was hit with a $40,000 fine for flipping off the refs when he disagreed with a penalty against his team.

Raiders coach Dennis Allen was asked in his weekly news conference about Tarver's actions and apology.

"I don't know if it's one of those things you just say, 'Let's forget about it,'" Allen said.

"Listen, he's made his statement about what's happened. I think the only thing I'll say is I think he's done an outstanding job with this defense. I think he's a fiery and emotional guy and I think our players have really taken to that, and I think they've embraced that type of attitude and he has the defense playing at a high level right now."