Al Jefferson is a really good player, and a team with several really good, low-level star players is going to be a playoff team and will compete.
If he suddenly was on our team today, he'd be the second best big man next to KG, and would start at C.
If he were on our team, he could be the "bailout guy" who can create his own shot, especially in a couple of years as the old timers fade away. He can get a bucket to stop an opposing team's run.
He would fit in fine with Rondo. Bigs are usually trailers on the break anyway, and he can finish on the run as well as in the post.
He would add a lot of offense and rebounding to the next version of the team core.
And his defense blows. He might give it more attention in a team culture that is committed on the defensive end.
His contract is less than max, but still a bucket of money, but expires in 2013, which isn't too long of a committment to trying out the combination.
And, if this weren't enough, if/when Doc hangs it up, we'll be perfectly positioned for the return of McHale to the sidelines!