LAS VEGAS -- Nationwide Series driver John Wes Townley has been cited for underage possession of alcohol.
Townley, who is 20, was cited Thursday.
He apologized to NASCAR and his Richard Childress Racing team in a statement issued late in Saturday's race by his race team.
"I made a big mistake and feel terrible about it," he said. "I have learned a valuable lesson and will do everything I can to make it up to those I have let down."
Car owner Richard Childress said Townley made an error in judgment that will be handled internally at RCR.
"Drivers are human and make mistakes like everyone else. However, we do not condone his behavior," Childress said.
Townley finished 15th in Saturday's race at Las Vegas Motor Speedway.