Of all players who has appeared in the NBA playoffs this year, Ray Allen is 135th in Efficiency per 48 minutes:
135. There are only 16 playoff teams. So, Ray's level of play puts him at about an 8th or 9th man on a mid-level playoff team. So, basically a guy who you wouldn't trust to play a whole lot in the playoffs. The three guys above him: Big Baby, DeShawn Stevenson, Jarvis Hayes. The next three below him: CJ Miles, Barbosa, Mo Evans.
According to basketball-reference.com, Ray and Rip Hamilton have faced each other 20 times:
http://www.basketball-reference.com/fc/h2h_finder.cgi?request=1&p1=allenra02&p2=hamilri01. Allen enjoys the slight advantage in virtually every stat and his team has won 13 of the 20 games.
If Ray Allen cannot be even a starter-level player in the playoffs, he needs to have some pride and walk up to Danny Ainge after the season and say, "I quit. I do not deserve the remaining $36MM on my deal. I am sorry for the dreadful showing I have made when my team needed me the most."
Or he can just step up and play better. One or the other.........