This is just an idea I've heard being tossed around..
Being a partial tear, and Rondo being a tough guy
What if we got to say, the ECSF, would you want him coming back, at say 30%? He would just stand at the top of the key, make a few passes and play maybe 20mpg.
I wouldn't be surprised if he came back during the Playoffs, even given the severity of a torn ACL. But I think Doc/DA will prolly say "NO, SIT DOWN" because it could destroy his (and the Celtics') future. Who knows?