i'm tyler manca. >> reporter: tyler manca fell in love with america's pastime when he was 4. >> i couldarely hold the bat and i remember going home and saying, dad, i love baseball. i got to play. >> reporter: smitten ever since. the senior at bishop o'dowd high school in oakland decided three years ago to share his love of the game by starting a nonprofit called "greatest game baseball academy," a free three- day clinic for boys and girls ages 11 to 14. >> 92% of youth baseball players quit the game before they enter high school. >> reporter: he believes a big reason many kids give up the game is because they can't afford to play on expensive club or travel times, an option for some kids after aging out of little league and before starting high school. that's why his academy is free. >> they have the same love of the game as me. they have the same talent but they couldn't play. >> reporter: the academy uses volunteer coaches and tyler's high school teammates to teach baseball skills to about 50 young players over the course of three sundays in january. >> tyler is the kind of kid that