Smith’s reinstatement comes following his Sept. 7, 2010 suspension for actions detrimental to stock car racing. Smith remains under NASCAR probation until Dec. 31. Frost has successfully completed NASCAR’s Road to Recovery Program following his May 24, 2011 suspension for violating the sanctioning body’s substance abuse policy.

Troy Hartman and Denise Harmon-Mixon, both crew members in the NASCAR Nationwide Series, have been indefinitely suspended from NASCAR for violating NASCAR’s substance abuse policy.