Mike and Kate travel to Minneapolis to meet the Minnesota Twins' star players: Marco and Pedro, a dynamic twin duo known for their signature triple plays. But after a water balloon attack on the players and a suspect on the run, questions start to pile up. Is someone trying to mess with Marco and Pedro's chances of making the playoffs? As Mike and Kate investigate, they meet Polly and Molly, twin Minnesota locals who lend a helping hand—or two. With new friends by their side, can Mike and Kate solve this mystery? Ballpark Mysteries are the all-star matchup of fun sleuthing and baseball action, perfect for readers of Ron Roy's A to Z Mysteries and Matt Christopher's sports books, and younger siblings of Mike Lupica fans. Each Ballpark Mystery also features Dugout Notes with more amazing baseball facts.