In 2013 when Bruce Arians and Steve Keim took the reigns the offensive line consisted of D'Anthony Batiste, Daryn Colledge, Lyle Sendlein/Scott Wedgie (Sendlein spent the end of the season on IR), Adam Snyder and Bobbie Massie/Nate Potter. PFF ranked the line the worst of 2012 and after a 5-11 season Ken Whisenhunt and Rod Graves were rightfully fired.
This year, four years into Keim's Red Reign, the line consists of Jared Veldheer, Mike Iupati, probably AQ Shipley, Evan Mathis and most likely DJ Humphries. Comparing the two years the talent levels are obviously very different but the composition of the lineman are also very different.