Harrison says he could have played 20 years in today’s NFL

Retired after the 2008 season, Rodney Harrison would still be playing if he had been playing under today’s rules. That’s what Rodney told Luke Hughes of NESN.com as Rodney prepares to return to Massachusetts to be honored by Boston Sports Museum at the 11th annual “The Tradition” on Wednesday, at the TD Garden. “They’ve cut…