Helping a new teammate is usually a good thing, but what if it costs you your spot on the team? Alfie Maples loves playing right field for the Peach Street Mudders. When a strange new kid named Roberti joins the squad, Alfie is totally confused. Roberti can barely hit the ball, and his catching skills are a mess! When the coach asks Alfie to help teach Roberti how to play, Alfie is proud to show off his baseball knowledge. He works hard to help the new kid improve. But soon, Alfie starts to worry. What if the coach is secretly planning to give Roberti the starting spot in right field? Did Alfie just train his own replacement? Find out what happens when jealousy and teamwork collide in this fun, fast-paced chapter book about sportsmanship and doing the right thing for your team.