Mariucci Sports - Youth Tapered Double-Knit Pant - Gray (MAPTTDK-GY-YL) Baseball Outerwear. As a company founded, majority-owned, and operated by current and former Big Leaguers, Mariucci is dedicated to quality and committed to providing players at every level with the tools they want and need to be successful. Based in Baton Rouge, Louisiana, Mariucci was founded by two former Big Leaguers and their athletic trainer who began handcrafting bats for some of the best players in the game from their garage. Fast forward 10 years, and that dedication to quality and understanding of players needs has turned into an All-American success story. Today, Mariucci is the new Number One bat in the Big Leagues.