why rajon rondo should be in the game for more then 14 minutes

why did doc rivers take rajon rondo out of the game. when rajon played only for 14minutes and a half . that was dissapointing because rajon was just getting fired up. the celtics could have probably won game 5 because rajons got speed and he gets the ball from the oppisite team gives it to some one for example ray allen. ray allen takes the 3 point shot. there it is a perfect play everytime. my last words are put rondo in the game for game 6