NASCAR legend Jimmie Johnson and NBA icon Shaquille O'Neal turned a playful X exchange into a free throw competition.

LOS ANGELES - Former NBA star Dwight Howard has reached his breaking point with Shaquille O'Neal's constant criticism ... If we got to fight it out then let's fight it out ...

The Gronk vs. Shaq boxing match first surfaced during the buzz that developed due to the Jake Paul/Mike Tyson fight. The chatter has been one-sided, as it is all coming from Shaq. That was until ...