Allen's loss is not that big, in that the Celtics had already signed a proven sixth man (Allen's likely role next season) in Jason Terry, who can be the spark that Boston needs off the bench.
However, it hurts that he joined Miami, the team Boston is directly competing with.
With this in mind, the Celtics major hole is not having a shooter like Allen, but rather having a true center, who would allow Kevin Garnett to play his normal role at power forward.
While KG was effective in the playoffs at the 5, he will likely wear down if he is forced to play at center for the entire season.
Getting a starting-quality center is difficult these days because they are so hard to find, or they are overpaid.
While acquiring and signing a top-ten big man seems unlikely due to the Celtics unwillingness to break up their core, and rightfully so, there are a few reasonable names that pop into my mind as potential fits in Boston.
The first is Chris Kaman. The former Central Michigan star has the ability to start on most teams in the league, but the problem boils down to his price.
Kaman will likely ask for a multi-year deal, where he earns seven to nine million dollars, making it difficult for the Celtics to sign both him and Jeff Green.
The second name that comes to my mind is Anderson Varejao. Before people start cracking jokes about how Joakim Noah and him look in this picture, they need to realize how well Varejao played last season.
With Kyrie Irving as his point guard, the Brazilian averaged 10.8 points and 11.5 rebounds and was once again a defensive presence.
Could you imagine how effective he would be with Rajon Rondo?
What makes him even more valuable is the energy he brings to the floor, something that the Celtics could use in tight playoff games.
With two high-energy big men in Garnett and Varejao on the floor, the Celtics' frontcourt, once considered to be a weakness, becomes a strength.
Acquiring Varejao is really going to be a struggle. I would definitely trade Brandon Bass and a future first-round pick for the Cavaliers center. However, Danny Ainge might have to add another pick to spice up the offer.
Needless to say, Varejao fits very well with Celtics because he is a defensive-minded center, who can take the load off of Kevin Garnett.
Hopefully the pending return of Jeff Green will allow for Doc Rivers to sit Pierce more and keep him healthy come playoff time.
If the Celtics want to win a championship with this veteran roster, they need to keep their veterans healthy. Adding Varejao would do just that, while also giving the Celtics an above-average starter.