http://www.baseball-reference.com/boxes/SDN/SDN200806020.shtml http://www.baseball-reference.com/boxes/FLO/FLO200808150.shtml http://www.baseball-reference.com/boxes/CHN/CHN200808210.shtml Three games in which Zambrano's offense contributed to a run, and the Cubs won by one. That doesn't mean the Cubs would have lost those games. On average, they would have lost about half. 3/2 = 1.5, pretty close to the original number. Zambrano's RBI's, which I'm assuming you're using to say he contributed a run, also came in the fourth, second and third innings, respectively. Considering the runs came early in each contest, there was still a lot of baseball left to be played and you can't assume that the games would have played out the same way. It's not like if Zambrano got the game-winning hit in the bottom of the ninth inning. I agree that Zambrano had a bigger impact with his bat than most people would expect considering he is a pitcher, but I don't think those box scores directly prove much of anything in of themselves. "prove" isn't quite what I was going for. I think it's more like "provide interesting context to the abstract value of Wins Above Replacement."