A champion NASCAR driver is to announce he is stepping down from racing - a year after the crash which killed Kevin Ward.
Tony Stewart will say he is retiring from the sport following the 2016 season during a news conference at his team's headquarters in Kannapolis, North Carolina on Wednesday, sources say.
The move follows a difficult year for the veteran driver whose racing accident on August 9, 2014 resulted in the tragic death of Ward Jnr.
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Clint Bowyer appears to be the most likely candidate to replace Stewart in 2017 after he was released from his contract with Michael Waltrip Racing - which folds at the end of the season, reported CBS News.