Martin Truex Jr. fired his pit crew after a botched final stop at Richmond, and Michael Waltrip Racing responded Tuesday with four personnel changes for the driver. Truex doesn't have any actual authority to fire his crew, but he did over his team radio Saturday night when a bad stop cost him a decent finish. "I appreciate the fact that MWR addressed the issue and we're moving on," Truex said in a statement. Truex has had a tough year despite having strong cars through the first part of the season. His good runs have been ruined by either mechanical issues or crew mistakes, and he goes into this Saturday night's race at Darlington Raceway ranked 22nd in the standings with just one top-10 finish. Read more:http://sports.espn.go.com/rpm/nascar/cup/news/story?id=6473652
