ARLINGTON, Texas -- These are conversations Brandon Carr wishes weren't one sided, but he finds himself having them during the course of every day.

He will say hello to Kasandra Perkins, remembering her smiling face.

Cowboys cornerback Brandon Carr intercepted Ben Roethlisberger in overtime to set up the game-winning field goal. Matthew Emmons/USA TODAY Sports

He will say hello to Jovan Belcher, his former Kansas City teammate, who shot and killed Perkins and then himself three weeks ago.

And he will say hello to Jerry Brown, his teammate with the Cowboys for only a few weeks before Brown died in a car accident.

With overtime against the Pittsburgh Steelers about to begin Sunday at Cowboys Stadium, Carr talked to Brown again.

"I'm going to make a play for you," Carr said, looking at Brown's No. 53 jersey as he made his way onto the field.

Oh, did Carr make a play. Maybe the biggest play of a Cowboys' season that might not end as soon as many people had thought.

On the second play of overtime, Carr intercepted Pittsburgh quarterback Ben Roethlisberger and returned the ball to the Steelers' 1. Two plays later, Dan Bailey made a 21-yard field goal for the Cowboys' 27-24 win that put them in a tie for first place in the NFC East with two games to play.

As Carr made his way back to the bench after his interception, he placed the ball next to Brown's jersey.

"Crazy, huh?" Carr said.

The emotions Carr has carried these past three weeks are more than many could bear.

He was Belcher's teammate and friends with Perkins. He and his fiancée hung out with the couple. He was rocked by the murder-suicide, unable to sleep or eat for days.