The question is which pitcher gets the win A or B?
My baseball team played a double header (each game 7 innings) recently. Pitcher A started game 2. Because he also pitched in game one (all 7 innings), he only went 3 innings in game 2. He didn't give up a run and when he left the game his team was winning 4-0.
Pitcher B came in to pitch the 4th, 5th 6th and 7th innings and never gave up the lead. However he did give up 4 runs in four innings. The final score of the game was 11-4.
Under MLB rules, who is credited with the win? A or B? And why?