Martin Truex Jr. is not sure what he must do to keep up with the powerhouse teams of Sprint Cup or how long he'll continue to face such questions. Truex Jr. led the most laps at Kansas, Charlotte and Dover yet didn't win any of them. Truex worked Wednesday to stay up front, taking part in a test session at Darlington Raceway before moving on to Michigan for this weekend's race for another chance to finish near the top. More...