Dallas Cowboys star wide receiver Dez Bryant made no apologizes for his temper bubbling over during some sideline incidents involving teammates in a 31-30 loss to the Detroit Lions.

Why was Bryant upset and angry with quarterback Tony Romo and tight end Jason Witten?

First, Bryant screamed at Romo following an incomplete pass to teammate Dwayne Harris. Then, Bryant got in an argument with Witten in the final seconds, according to ESPN Dallas.

Bryant finished with three receptions for 72 yards and two touchdowns.

"My passion is always positive," Bryant said. "It's going to remain the same way. I'm not saying anything wrong. I'm not saying anything bad. It's all positive. That's just what it is. I'm the nicest person off the field. When I'm on the field, even when I look angry, it's still all good passion.

"It's all good passion. I feel like that's what we need. I'm going to remain the same way. I feel like I love this game. I love it. In order to win, you've got to be passionate about this game. You have to be. You've got to let that dog come out and just put it all out there on the line."

Romo didn't seem to have an issue with Bryant afterward.

"He's never complained to me about getting the ball," Romo said. "He knows that the ball's going where it's supposed to. He knows that. When you guys sometimes see emotions from Dez, it's just trying to 'rah, rah' more than it is being a 'me' guy. That's not who Dez is. I think that would be completely out of character for him if there was ever a 'me' situation."

Witten had a similar sentiment, as did owner Jerry Jones.

"Not in any way did it concern me," Jones said. "It's not a negative for our team. Matter of fact, when he started that as I saw timing-wise, we started playing better on our offense and the defense didn't hear it. They were out on the field. It's not an issue. I'm not trying to make light of it.

"But he's a very passionate player and he competes and works and does all the things that give him the collateral to use with his teammates and with me relative to a few awkward moments on the sideline, overexpression of passion. He's bought enough slack with me."

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Aaron Wilson covers the Ravens for The Baltimore Sun.