Jason Kelce expresses remorse for throwing a Penn State student's phone on the floor after the heckler vilified his brother Travis Kelce over his relationship with Taylor Swift.

“Look, I’m not happy with anything that happened. I'm not proud of it,” Jason said during ESPN's pre-game show Monday night before Travis and his Kansas City Chiefs teammates took on the Tampa Bay Buccaneers at Arrowhead Stadium.

“In a heated moment, I decided to meet hate with hate, and I just don't think that's a productive thing to do. I really don't. I don’t think it creates discourse and that it’s the right way to do things.”

The 36-year-old NFL star and now-commentator admitted that he “fell to a level he shouldn't have.”

“The bottom line is… I try to live my life by the Golden Rule. That’s what I was always taught,” he continued.

“I try to treat people with decency and respect and I will continue to do so, even if I failed to do so this week. I will do that in the future and continue to do that.”

The tense moment between Jason — who was at Penn State University over the weekend for ESPN's “College GameDay” — and the student was caught on camera and quickly went viral.

“Kelce, how does it feel that your brother wants to date Taylor Swift?” In the background of several videos shared on social media, the troll could be heard yelling at Jason.

The retired Philadelphia Eagles center immediately turned around, grabbed the man's phone and smashed it on the street before picking it up and walking away when the student demanded Jason give it back.

In another video of the incident, the former athlete then asked the harasser three times, “Who's the devil now?”

Penn State University Police and Public Safety are investigating the incident, Page Six was previously told.

Reps for Jason – who has always supported 35-year-old Travis' relationship with pop superstar Swift – never responded to our request for comment.