Audio problem: When the three die-hard Indian's fans are arguing over the ball that gets hit out of the park (a guy is saying "It's too high"), one of the guys says "Who gives a s***, it's gone". If you look closely at his lips, he is saying something entirely different. (00:38:00)
Audio problem: In the scene right after Eddy Harris steals Jobu's rum and then walks out of the dugout onto the field for practice, you can hear him yelling "Hey bartender, Jobu needs a refill", but it is extremely clear his lips are not moving at all. (00:53:15)
Audio problem: As Harry Doyle celebrates with his broadcast partner, one of them is heard shouting "I can't believe it!" but the dialogue doesn't match either men's lip movement.
Answer: He just shows up, uninvited. When he first arrives, they can't find his name on the list; he's later (comedically) removed from camp in the middle of the night when security carries him out on his bed (while commenting "This is the guy who wasn't invited to camp"). So, he's relying on his speed and charm to get him a spot on the team... which, of course, ultimately works.