PARIS -- Formula One driver Scott Speed injured his left wrist Thursday in a testing accident at Jerez, Spain, making him the second American driver in a week to withdraw from the Race of Champions Nations Cup due to injury.
"Scott is out -- his wrist isn't broken but it's injured badly enough that his team [Red Bull Toro Rosso] doesn't want him to drive," Jim Hancock, head of RoC USA, said Friday. "He tried a lap in the car today [during practice] and couldn't go."
Indy Racing League driver Marco Andretti, who was also testing at Jerez, was greatly interested in taking Speed's place, but team conflicts prevented it, Hancock said.
As a result, X-Games star Travis Pastrana is forced into unprecedented one-man duty for Team USA. The RoC consists of a pair of races -- one of which pits asphalt specialists against one another; the other dirt specialists. Pastrana will compete in both.
In turn, Hancock explained, the event schedule may require tweaking in order for Pastrana to make every engagement.
"Travis did four events back-to-back in the X-Games last summer and had to helicopter back-and-forth all over LA," Hancock said. "He won three gold medals."
Pastrana, a motocross icon who this year switched to four wheels and claimed the North American Rally Championship, was initially slated to compete as Team USA dirt specialist.
"It's just too late to find a replacement driver," Hancock said.
NASCAR's Carl Edwards was summoned, Hancock said, but was unable to attend due to late notice. Earlier in the week Indy Racing League Champion Sam Hornish Jr. was asked to participate, but he, too, declined due to preexisting engagements.
That opened the door for Speed, who Wednesday was tabbed to replace injured NASCAR champion Jimmie Johnson. Johnson broke his left wrist last week while participating in a charity golf tournament in Florida.
Marty Smith is a contributor to ESPN.com's NASCAR coverage. He can be reached at ESPNsider@aol.com