In a 1 run win, you could claim anyone who got a run or RBI won the game for their team, so you can't give a full win to any one player. Seems to be what many fans want to do and may be one reason why so many scoff at the relatively low seasonal "wins above AAAA player" numbers even a great batter puts up in a year. Also, fans seem to also sometimes ignore when a batter does something that hurts the odds of a team winning. You have to sum it all up. WPA gives a percentage credit or debit for each PA but you can receive +WPA in a loss and -WPA in a win. Not sure if the original poster wants to include that performance or not. Also, WPA does not adjust for opportunity. If Braun has had a lot of opportunity to shift the team's odds of winning a game, so might have his replacement. Here are the WPA values for the Brewers so far this year: http://www.fangraphs.com/leaders.aspx?pos=all&stats=bat&lg=all&qual=0&type=3&season=2012&month=0&season1=2012&ind=0&team=23&rost=0&age=0&players=0 Not unexpectedly, Braun has more net WPA that anyone else on the team. His LI is about 1, which means he's average in terms of having gotten opportunities to rack up WPA. Really though, it's impossible to reconstruct each game, with Braun being replaced by Aoki or whatever. His WAR does tell us that if he had been replaced by a AAAA backup and played in completely average games, he would have won 3 more games for his team than his scrub replacement. That's good enough for me.