If 5 different basball pitchers who gets the win?

Answer 1

That depends on the circumstance.

If the starting pitcher doesn't make it through 5 innings but his team is leading then it's up to the official scorer to determine which reliever deserves the win by how well he pitched in the game - in most cases whichever reliever comes in first will be awarded the win.

However if a starting pitcher pitches through 5 innings and the team holds on to the lead then he'll be awarded the win.