Redskin Insider -- Don't Believe the Hype

[SC Skins Fan]

Originally Posted by Beemnseven

The history of the NFL is full of flash-in-the-pan running backs who look like dynamite for a season or two, then rapidly fade away. So far, Portis has lasted longer than that. To assume that he is immune to that scenario is shortsighted.

It wouldn't surprise me that if 2008 is less than spectacular, his time here will be shorter than expected.

JLC's point is that by giving him big up front money and guaranteeing his salaries in 2008-2009, and a good portion in 2010, the scenario you suggest is not a possibility.

The point is not that Portis is a flash in the pan running back, but rather that running backs typically have short windows of effectiveness in the NFL. Portis has a lot of carries in his first five seasons, is not a particularly big back, and his game is extremely physical. I think he can do it for another three years, but probably won't go much after he turns 30 - but few backs do. I suspect also that is part of the reason why the FO felt comfortable guaranteeing salaries basically until Portis is 29-30. That is typically when elite running backs decline in effectiveness (typically dramatically, see Shaun Alexander - Tiki Barber is an exception, but had fewer carries early in his career).