Will Greene be on Titans' roster bubble?

Casual observers may not even remember that Shonn Greene was on the Tennessee Titans roster last season. After all, he took part in only 11 games, mustering a meager 295 rushing yards, 4 TDs and 3.8 YPC. Now, he is coming off of his second knee surgery in nine months, and the Titans added some new members to their backfield this offseason, so it's fair to wonder whether he could be a roster casualty.