Taking this in a different direction, I'd like to suggest that leaving too many runners on base is too often over-analyzed when it should be dismissed as bad luck. If my team is consistently hitting its way on base, then it should be able to hit those runners in, IMO. Let it happen. If it doesn't, it's bad luck. Clutch hitting (or lack of it) is frequently something we like to attribute to kids when there's not enough evidence to support that it exists. I'm not suddenly going to start bunting and stealing w/ runners on base just because I left runners at 2nd/3rd the previous two innings, or because I think a certain girl hits worse when there are runners in scoring position.