Brian Vickers will not be competing in this weekend's NASCAR Sprint Cup Series race at Auto Club Speedway in Fontana following a recurrence of health problems.
Sunday's race at Martinsville saw a race-long tit-for-tat battle between Kasey Kahne and Brian Vickers with both drivers seeing retaliation on the other.
Martin Truex Jr. will leave Michael Waltrip Racing at the end of 2013 and take over from Kurt Busch at Furniture Row Racing next year, according to media reports on Thursday.
Brian Vickers will miss the remaining races of the Cup and Nationwide Series after being placed on medication for a blood clot discovered in his right leg.
Michael Waltrip Racing has confirmed that Martin Truex Jr. broke his right wrist in an accident at Bristol Motor Speedway on Saturday, but that he will attempt to race this weekend.
Mark Martin will replace Denny Hamlin in the Joe Gibbs Racing #11 for one race only, with Brian Vickers taking over the seat for the rest of Hamlin's absence.
Rodney Childers will join Michael Waltrip Racing as crew chief for David Reutimann's #00 Toyota in NASCAR's Sprint Cup Series next year, the team announced Wednesday.
During qualifying for last weekend's Samsung 500 at Texas Motor Speedway - the seventh round on the 2008 NASCAR Sprint Cup calendar - Michael McDowell suffered the mother of all shunts in the #00 Aaron's Toyota machine.