Shaun claims he has gotten interest from both the Patriots and the Colts, but there has been no independent confirmation of that to date. And actually, most NFL sites don't believe that either one of those two teams have shown any valid interest.
The Colts have Joseph Addai who has already proven himself to be one of the best backs in the game. Behind him, their back-up is Kenton Keith, who has proven to be
very good in limited opportunities. According to the
advanced metrics of Football Outsiders, he had both the highest DVOA and DPAR of any tailback in the league with fewer than 175 carries, including San Diego's Michael Turner.
The Patriots have Laurence Maroney as one of the best backs in the league. He's still one of the youngest backs in the NFL -- just turned 23 -- and he has a very long, productive future ahead. Beyond that, the Pats are already set with a great third down back with former LSU standout Kevin Faulk.
The harsh truth of the matter is that neither the Patriots or the Colts need Alexander, and in all honesty he would probably be no higher than the third tailback on the roster at either place. Both teams throw the ball a lot, and that's bad news for Alexander, who rarely saw the field on third down even during his prime in Seattle. Moreover, neither team uses the third back any legitimate amount, so Shaun wouldn't see the ball. Last year the Colts' third team back got only 30 carries, and in fact the Patriots didn't even have a third tailback, they just rotated a fullback into a single back set when the need arose.
I don't think either the Patriots or Colts would be legitimately interested in Alexander, and even if so I don't think Alexander would be interested in the way they would likely use him. I figure that Alexander is basically just trying to drive up interest in his own services by trying to convince everyone else that the top teams are wanting him. It's not a bad idea, but I'm afraid no one is buying it.