Auto Club 400

Auto Club 400

FONTANA, CA – MARCH 22: Brian Vickers, driver of the Michael Waltrip Racing Toyota, answers questions from media during a press conference before the NASCAR Sprint Cup Series Auto Club 400 at Auto Club Speedway on March 22, 2015 in Fontana, California. Vickers was forced to withdraw from competition due to blood clots. (Photo by Robert Laberge/Getty Images)

Greg Engle