I put this in the Ravens thread but he is a little more on it.
http://profootballtalk.nbcsports.com/2012/02/07/ricky-williams-is-ready-to-retire-but-it-may-not-stick/
The long, strange NFL trip of Ricky Williams may be over.
Mike Florio reports via a league source that Williams has informed Ravens officials of his plan to retire. We say only that it “may be over” because Florio was told there’s a belief Ricky’s decision to retire won’t stick.
Williams is often full of surprises, and veterans that decide to retire shortly after a devastating playoff loss often change their mind by training camp.
The news comes as a surprise to Baltimore. Williams said a few weeks ago he planned to continue playing and the Ravens would have gladly welcomed him back after a solid 2011 campaign. He was under contract to the Ravens for another season.
If this is really it, Williams concluded one of the most fascinating and often under-appreciated careers in recent NFL history. He’s 26th all-time in rushing yards.
When Williams first “retired” in 2004 to search the globe, it was hard to imagine he would carve out six more seasons, mostly as a hard-working role player. He was also suspended for all of 2006, but returned to the Dolphins and wound up topping 1,000 yards rushing in 2009 for the fifth time in his career.
The NFL is a less interesting place without Williams in it. But we have a feeling Ricky may not be done running just yet.