Michael Waltrip Racing on Thursday picked Elliott Sadler to close out the season in the No. 55 Toyota while Brian Vickers is sidelined treating a blood clot.
Vickers informed the team Monday doctors had found a small clot in his right leg, and the blood thinners needed to treat it prevent him from racing. He's expected to take blood thinners at least two weeks.
Vickers also missed the final 25 races of the 2010 season with blood clots, and during that time required heart surgery.
Team co-owner Waltrip was already scheduled to drive the car this weekend at Talladega. Sadler will drive the car at Martinsville, Texas, Phoenix and Homestead.
Sadler has 431 Sprint Cup starts, and his three career Cup wins include a 2004 race at Texas. Sadler, like Vickers, drives a Joe Gibbs Racing Toyota full time in the Nationwide Series.
''First, I am already a teammate of Brian's at Joe Gibbs Racing and it is really tough to see him going through this again,'' said Sadler. ''Both of us have foug...