Sprint Cup driver Brian Vickers is expected to miss at least three months while undergoing treatment for blood clots, a source close to the situation told ESPN.com on Wednesday. Red Bull Racing officials said they continue to wait for final recommendations from doctors and that details of Vickers' prognosis will be announced on Friday at Charlotte Motor Speedway, where the 26-year-old driver and general manager Jay Frye will appear at a news conference. Casey Mears replaced Vickers last weekend at Dover International Speedway and finished 22nd. Mears again will drive the No. 83 in Saturday night's All-Star Race after Red Bull requested a driver change on Wednesday. Red Bull officials said Vickers is responding well to treatment and continues to undergo tests in Charlotte, where he returned after being released from an undisclosed Washington, D.C., hospital on Friday night. Vickers' former boss, Rick Hendrick, said Wednesday on his Amp Energy video conference that he has spoken to Vickers. http://sports.espn.go.com/rpm/nascar/cup/news/story?id=5201813
