Due to the nebulous nature of the award, it's tough to question the selection.
Playing behind a patchwork offensive line in a system which had grown stale, Rivers authored a whopping 47 turnovers while taking 79 sacks from 2011 to 2012. Whisenhunt boldly predicted in May that his quarterback would return to Pro Bowl form, and that's exactly what happened during a career renaissance.
In his estimable Quarterback Index series, Gregg Rosenthal has ranked Rivers among the NFL's top three quarterbacks since September.
Rivers entered the 2013 season in prove-it mode, at the crossroads of his Chargers career. He finished it by reclaiming his status as one of the top half-dozen quarterbacks in the league.