The last seven NFL Offensive Rookies of the Year have come from the NFC, beginning with Vikings RB Adrien Peterson in 2007 and ending with Green Bay RB Eddie Lacy last season. The last AFC player to win the award was Titans' QB Vince Young in 2006. Other recent winners: Falcons QB Matt Ryan (2008), Vikings WR Percy Harvin (2009), Rams QB Sam Bradford (2010), Panthers QB Cam Newton (2011) and Redskins QB Robert Griffin III (2012).
This year, there are quite a few early candidates from both conferences. Over time, the running backs have had a clear advantage over the QBs and receivers, but that is changing.