I wish there was a stat that fined tuned what a batter does with RISP, beyond BA and # of outs. What I would like to know is how many cumulative RISP does a batter leave on base, and what is an appropriate measurement for that. If a guy has 50 RBIs but has left 100 RISP, which includes situations where there are multiple RISP, what does that say? I realize of course that other contributions are possible with RISP not necessarily reflected in RBIs: advance the runner, draw a walk, station to station single. At the same time, solo homeruns count as RBIs, so the batter can also build his RBI count without any RISP.

To me, if a guy has 50 RBIs at the end of August, and has cumulatively stranded 100+ RISP over the season, I don't really see that as a great performance, even on a team that is 91-37, and especially if the guy is batting 4th or even 5th.  Batting average with RISP catches most of it, but not the whole picture.