Stranger in right field

Right fielder Alfie Maples is mystified by the newest member of the Peach Street Mudders. As far as Alfie can see, Roberti Frantelli can barely catch a ball or hit. Then Coach Parker asks Alfie to show the newcomer the ropes. Alfie is flattered and teaches Roberti all he can -- but begins to suspect that the coach plans to start Roberti in his position in the next game! Who is this strange new player, and can Alfie continue to help him play his best?