I thought about that but it didn't seem right. I guess the reason I'm hung up is because the player doesn't contribute the runner that's on base, so if we're trying to mitigate environmental effects (park, league, team) as much as possible, a walk and a single are the same exact thing. But that's not right though, because we're pretending the team is average, not non-existent, so for all the situations where they're not worth the same, a single is more valuable than a walk. Am I getting there or am I still way off?