But here is where the story turns strange.
July 19, 1955: Bat 089, top of the 4th, 2-2 count. Check swing. Yes (ump calls ball). Walk. Later scored.
The bat was retired the next day.
June 3, 1954: Bat 089, bottom of the 7th, 3-2 count. Check swing. No (ump calls strike). Batter out.
Bat 089, used by batboy for warm-up swings. Check swing count: 1,447. Last recorded event: bottom of the 9th, tie game. Batboy swung at a high fastball, stopped the bat an inch from the zone. Ump called it a strike. Game over. Keystones lose. serial checker bat
In the dusty basement of the National Baseball Hall of Fame, tucked between a shoeless Joe Cronin’s spikes and a piece of the old Yankee Stadium frieze, hangs an unremarkable piece of ash wood. It is cracked at the handle, stained with pine tar, and bears the faded number “24” on the knob. To the untrained eye, it is a broken bat. To the archivists, it is known as the Serial Checker Bat .
The bat was Number 089. It was a 33-inch, 31-ounce black ash model, slightly end-loaded. It belonged to a middling utility infielder named Mickey “Two-Count” Marchetti, who was famous for his ability to work a full count and then check his swing with balletic precision. Every time Marchetti held up—every time the home plate umpire appealed to the first or third base ump for the call—Leo would dutifully record it. But here is where the story turns strange
Every season, players would lose bats, swap them, or claim teammates’ lumber as their own. Locker rooms descended into petty squabbles over who owned the 34-ounce Louisville Slugger with the thin handle. In 1951, Leo had enough. He took a stamp kit and a set of metal dies, and he imprinted a unique three-digit serial number on the barrel of every single bat in the Keystones’ clubhouse: 001 through 212.