He must pitch a minimum of 5 complete innings.
10 innings in 3 days
As many as he can in a game before his couch takes him out
There is no limit in regards to how many innings a Starting Pitcher must pitch in the Major League Baseball All Star game, a team can be winning and the Starting Pitcher could pitch only 2 innings but because All Star games have different rules, they can be given the Win.
Four consecutive innings if she is the starting pitcher. There's no minimum number required for relief pitchers.