Tyrann Mathieu Calls Out Brad Keselowski for Mocking His Pet Car Safety Video

NASCAR Cup Series driver Brad Keselowski wondered why Kansas City Chiefs defensive back Tyrann Mathieu only lasted eight minutes in a 120-degree car while filming a video about pet safety.

The NFL player fired back Saturday with a NSFW message on Twitter (he's since deleted the tweet):

Keselowski was clearly attempting to make a point about the toughness of NASCAR drivers, who regularly endure car temperatures around 130 degrees for hours at a time during summer races.

Meanwhile, Mathieu wanted to showcase the importance of not leaving dogs or other pets in a vehicle during a hot day because the temperature can rise rapidly when the windows are rolled up. He wasn't trying to make an ironman effort at staying in the car.

The video, which was originally filmed for PETA in July 2015, has over 5.7 million views on YouTube:

It's unlikely anything more comes from the sudden cross-sport rivalry.