NASHVILLE, Tenn. -- Marcus Mariota knows Sunday’s game at Arrowhead will be the coldest he’s ever played in.

The forecast calls for a high of 19 degrees at Arrowhead Stadium on Sunday.

“I’ll be ready. I’ll be ready,” the Tennessee Titans quarterback said. “It’ll probably be the coldest game I ever played. But I’m looking forward to it. It’s going to be a fun atmosphere, and I can’t wait to do it.”

The game may recalibrate Mariota’s thinking regarding cold games. He said he never played a game in high school in Hawaii in temperatures colder than 75 degrees. And off the top of his head, he said his previous coldest game was probably at the end of his final year at Oregon during a win over Oregon State in Corvallis.

“It was in the 20s or something like that,” he said.

"It'll probably be the coldest game I ever played. But I'm looking forward to it," Marcus Mariota said of playing in Kansas City. AP Photo/Rick Scuteri

Actually, it was 40 degrees at kickoff.

Mariota experimented with a glove at Wednesday’s practice but didn’t like the feel of it and won’t use it.

Don’t expect offensive linemen to wear anything extra either.

The unit used to have a rule: If you didn’t wear something on opening day, you couldn’t wear it later in the season. Left tackle Taylor Lewan said the rule no longer exists, but anyone wearing sleeves will be giving his linemates ammunition that can be used at any time.

“We’re just letting it roll. If you want to wear long sleeves, you’re more than welcome to,” Lewan said. “I will not be wearing long sleeves on Sunday. You don’t work this hard for arms in the offseason to wear sleeves.”

On the other side of the ball, defensive lineman Jurrell Casey said he will feel zero shame about bundling up if he returns to the lineup from his sprained foot.

“I’m definitely not looking forward to it. I’m definitely going to prepare for it,” said Casey, who’s from Long Beach, California, and played at USC. “It’s going to be a tough one for me. I’m not a cold-weather guy.

“You just make sure you bundle up. I’m definitely going to be a guy who makes sure I am as warm as possible. I’m not going to be one of those tough guys saying I’m not going to sleeve it up or anything like that.”