You can extend him after his 4th year in the NBA or something like that...I'm not sure if he has to have been with those teams for the entire 4 years...
I personally want to see Robert Horry finish his career as a Spur like Danny Ferry did...I think if Horry wants to he can play until he's about 37-38 years old(If Kerr and Ferry can do it Horry definitely can)...
You just never lose clutch...Kerr...Reggie Miller...it never goes away...Just keep Horry around...until he no longer wants to be here...I don't want to see that er back on the Rockets and there's where he will go if not here I think.
Put it this way...if Horry wants to stay here that's probably because he smells more rings in the future...just pay him 2 mil a or so a year and he'll hang around ...he doesn't care about PT really at this stage...he's never liked starting.
I say why not let the dude retire a Spur...he's at the stage now where he's actually kind of a lockerroom leader anyway...something he never was before...and he evidently loves playing out of the bigmedia spotlight in comfy SA.