Age alone doesn't always provide an accurate forecast. ColdHardFootballFacts.com, an outside-the-box analytical site, recently theorized the sell-by date for a running back is 2,800 touches, the combined number of rushing attempts, receptions and kick returns.
Based on that, Taylor is closest to the end. He turned 34 in January and missed most of last season because of ankle surgery. He has 2,779 touches. Don't expect much, even in the Patriots' diluted backfield.
Williams is next. He will turn 33 in May and is coming off a season in which he rushed for 1,121 yards, breaking the NFL record for most years between 1,000-yard campaigns.
Dolfans point to Williams' extended absence from the game as a reason he still has something left. But in his prime, Dolphins coach Dave Wannstedt rode him hard. Williams recorded at least 430 touches in consecutive seasons and has amassed 2,474 to date.
The Patriots' other two tricenarians have lower mileage. Faulk has only 839 career rushing attempts, and even with his 181 kick returns, has 1,537 touches. Morris has only 32 career starts and 853 touches.