According to teammate Jason Terry in a recent ESPN interview:
“His routine is long-winded and it lasts all the way through tip-off. It starts in the back hallway. He runs down a corridor and he throws the ball to our team chaplain, who throws it back. Then [Rondo] runs out into a circle, high-fives the whole team and then he does the layup lines for five minutes.
“Then he will stand under the goal and Paul Pierce will shoot every ball on the rack from half court. Rondo will catch four balls at one time and then after that, it’s just amazing — one pass off the backboard to KG, one bounce pass to Paul Pierce and then he throws it all the way up to the scoreboard and Jeff Green finishes with an alley-oop.
“It’s every game, even road games. I have no idea how he started it; I’m new to the team. I was still going through layup lines and I almost got hit with one of those balls in the head. I wasn’t aware that’s what they were doing. It threw me off.”