This is the fifth in a series of 2013 Sprint Cup Series driver recaps that will be featured on NASCAR.comAlthough he won one race and qualified for this year's Chase for the NASCAR Sprint Cup, the 2013 NASCAR season was definitely an "off" year for Roush Fenway Racing driver Greg Biffle.Paired with crew chief Matt Puccia for just the second full season, the team fought often to find speed, and struggled for much of the season to find consistency. ... More...