Frazier & Kubiak go from teammates to opponents

"The first thing he said to me when I saw him on Sunday was that me and him were enemies from here on out this week," Corey said. "That just started it off, and there's been a lot of little jawing back and forth, a lot of little remarks."

Corey and Klein both plan to be on the sidelines with their fathers for Sunday's game, where the Texans need a win to secure a first-round bye and home-field advantage throughout the AFC playoffs. The Vikings are trying to keep their postseason hopes alive with Adrian Peterson entering the game just 294 yards shy of breaking the NFL single-season rushing record — a fact that Corey has mentioned often.

"He's got a pretty big card in (Peterson), so he's been building that one up," Klein said, laughing. "We've gone back and forth."

Corey got to Rice first, and Klein didn't realize his father also coached in the NFL until Gary mentioned it to him. They've since become close after bonding over the shared experiences of growing up with fathers who were NFL coaches.

"We just had so much common ground," Corey said. "Our parents both have similar qualities, similar rules as to how they want us to live our lives, and since we are under so much scrutiny that made me and Klein pretty close."

The pair find it odd that they ended up at the same school because their fathers, who both played in the NFL before moving to coaching, have known each other for decades.