Robert Horry is among the handful of role players who plays very well within an established system. In Houston, it was triple team Olajuwon, out to Horry for a three. When Houston ditched him, Kenny Smith, and Cassell for a washed up Barkley, the Sonics simply took out Drexler's slashes to the basket, since Glyde's outside jumper wasn't falling, and the entire Rocket's game was neutralized to Olajuwon having to score for everyone else.
Likewise, in LA and SA, Horry pulled a repeat performance esp in the '01 Game 3 against the Sixers when he was a 3 pt machine in the end. I think for the most part, he'll do that for the C's, with the occasional shot blocking, fill-in for KG, 'cause he'll essentially be on stage for 5 mins a contest and that doesn't take a lot out of a veteran player.