The problem with this that you seem to be ignoring is that "clutch" is not a repeatable skill. They may have one year where they hit .350 with RISP, and then follow up the next year hitting a measly .220. Over a career, one's "clutchness" tends to trend towards their career average, and there is plenty of evidence towards this. I'll make it real easy to prove this. Name 10 present day major leaguers who are clutch, and base it only on their RBI totals. Once you've done this, we can look into their careers a bit closer. Whether you like it or not, RBIs are very much a team dependent thing. Other than by home runs, you won't be racking up RBIs when the guys in front of you don't get on base. And in the event that the guys in front of you do get on base, you'll find plenty of situations where a hitter gets an RBI without ever reaching first base. RBIs are team stats. I'm far more interested in how a team as a whole gets them, and the best way to get lots of RBIs is to stack a lineup full of guys with high OBP/OPS.