Austin Dillon said after the STP 500 at Martinsville Speedway on Sunday he needs to grow up and keep his mouth shut on the radio.
We have a feeling Dillon's grandfather and team owner Richard Childress is thinking the same thing after what Dillon said on the track.
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After teammate Paul Menard pushed Dillon up the track with nearly 120 laps remaining, the two teams shared expletives on the radio. But none were worse than Dillon, who said "f— my teammates, f—each and every one of them.