the relief pitcher. The starter must go 5 innings to get a win.

If the starting pitcher is pulled early and more than one relief pitcher makes an appearance in the game, the official scorer gives the win to the relief pitcher the official scorer judges most effective. If two or more relief pitchers were similarly effective, the official scorer gives the presumption to the earlier pitcher as the winning pitcher. http://mlb.mlb.com/mlb/official_info/official_rules/official_scorer_10.jsp Here's the rule: 10.17 Winning And Losing Pitcher (b) If the pitcher whose team assumes a lead while such pitcher is in the game, or during the inning on offense in which such pitcher is removed from the game, and does not relinquish such lead, is a starting pitcher who has not completed (1) five innings of a game that lasts six or more innings on defense, or (2) four innings of a game that lasts five innings on defense, then the official scorer shall credit as the winning pitcher the relief pitcher, if there is only one relief pitcher, or the relief pitcher who, in the official scorer’s judgment was the most effective, if there is more than one relief pitcher. Rule 10.17(b) Comment: It is the intent of Rule 10.17(b) that a relief pitcher pitch at least one complete inning or pitch when a crucial out is made, within the context of the game (including the score), in order to be credited as the winning pitcher. If the first relief pitcher pitches effectively, the official scorer should not presumptively credit that pitcher with the win, because the rule requires that the win be credited to the pitcher who was the most effective, and a subsequent relief pitcher may have been most effective. The official scorer, in determining which relief pitcher was the most effective, should consider the number of runs, earned runs and base runners given up by each relief pitcher and the context of the game at the time of each relief pitcher’s appearance. If two or more relief pitchers were similarly effective, the official scorer should give the presumption to the earlier pitcher as the winning pitcher.

Since he pitched only two innings, the starting pitcher cannot get the win, and the official scorer must award the win to to one of the relief pitchers. There is no save since the final pitcher came on the mound with a ten run lead and pitched not more than two innings. This is an unfair rule because a starter must pitch five innings to qualify for a win and a relief pitcher needs only a third of an inning pitched. I suggest the following change in 10.17(a) (replacing 10.17 a b c e): If the pitcher closing the half inning before the winning run scores is a relief pitcher, award the win to that pitcher, otherwise award the win to the first pitcher getting the most outs (innings pitched). In this case, the starter would get the win because he was the pitcher with the most innings pitched (two innings). Peter Gaposchkin