2013 NASCAR Martinsville: April 5-7, 2013 Martinsville, Virginia USA Brad Keselowski and Marcos Ambrose pitstops © 2013, Brian Czobat LAT Photo USA .
April 5-7, 2013 Martinsville, Virginia USA
Brad Keselowski and Marcos Ambrose pitstops
© 2013, Brian Czobat
LAT Photo USA
.