Tony Stewart competes unannounced in sprint car event, wins

Tony Stewart was back in a sprint car on Friday night, the same series he raced in when he broke two bones in his right leg, winning the feature at Tri-City Motor Speedway in Auburn, Michigan.

It was unknown if this is Stewart's first sprint car race this season because he didn't announce when he'd compete. Stewart is available because the NASCAR Sprint Cup Series is off this weekend.

Stewart's runs were posted on Facebook and Twitter. Dirt track star Dustin Daggett tweeted a photo of Stewart's No. 14 car at Tri-City. Daggett also tweeted, "Raced hard in heat against Tony Stewart! But we got him, now for the Feature!"

But Stewart got everyone in the showcase race.

An error occurred while retrieving the Tweet. It might have been deleted.

My night was made because of @TonyStewart . How cool to see him in such a small down! Glad you won, great race ?? pic.twitter.com/W9SwCAGp8f
— Samantha (@samiam0921) July 19, 2014

Stewart crashed last year at Southern Iowa Speedway in Oskaloosa, where he flipped his 360 winged sprint car while leading with five laps remaining in the 30-lap feature. He missed the final 15 Cup races last year after breaking his leg in two places.

Stewart posted several pictures to his new Twitter account in May of a car he drove for a test session. He also posted that the car had safety improvements to the torque tube to prevent an injury such as the one he suffered.