Just a thought?
Doc brought up Rondo and is somewhat of a father figure to him and can relate to him from being a PG. We all know Rondo has a temper and is cocky . Add Rivers playing under his father and that has potential to be a disaster ....
But then again he would give us someone that can create 1 on 1 and I think he will develope into a good enough shooter to play off the ball ....