Conversation so far:
where was mike's childhood years?
Piazza was born in Norristown, Pennsylvania, grew up in Phoenixville, Pennsylvania, and.
where else did he grow up in?
CANNOTANSWER.
what is interesting about his childhood?
Tony, and Tommy.
Mike grew up a Philadelphia Phillies fan, and admiring Hall of Fame Third baseman Mike Schmidt.
did this admiration make him a baseman?
Piazza's childhood friend Tommy Lasorda, the godfather of Mike Piazza's youngest brother, Tommy--visited Philadelphia, Piazza visited the Dodger clubhouse and served as a bat boy in the dugout.
what was the outcome of this bat boy service?
He saw that Mike Piazza had potential in the sport, and began encouraging his son to build his arm strength at the age of five.
what other training did he receive?
Piazza received personal instruction in his backyard batting cage from Ted Williams.
what was ted's assessment of piazza?
Hall of Famer praised his talent, advised him not to let anyone change his swing, and autographed Piazza's copy of Williams' The Science of Hitting.
did this inspire piazza do to better?
Hitting.
Vince Piazza threw hundreds of pitches nightly to his son, who shared his father's focus on baseball.
what is the most interesting aspect of this dad son relationship?
He attended Phoenixville Area High School and graduated in 1986.
what followed his graduation?
CANNOTANSWER.
any other interesting information in this section?
Vince Piazza's own hopes of playing baseball had ended at the age of 16 when he left school.

Question: why did this happen?
Self-contained rewrite: Why did Vince Piazza leave school?