10. Gabby Hartnett

For nearly two decades, the heartbeat of the Chicago Cubs lived behind a chest protector. Gabby Hartnett didn’t just play catcher; he revolutionized it. Arriving in Chicago in 1922, he spent the next 19 seasons proving that the man calling the game could also be the one to end it. In 1925, he became the first catcher in baseball history to launch 20 home runs in a season, a feat that, at the time, felt like a glitch in the game’s logic. By the time he hung up the mask, his 236 home runs stood as a record for the position, a benchmark that would last for decades.

Hartnett’s run was a perfect marriage of offensive thunder and defensive authority. While he hit for a career .297 average, including a career-high .344 that secured him the 1935 National League MVP, he was just as dangerous with his right arm. He led the league in Caught Stealing Percentage six times, effectively shutting down the running games of every rival in the circuit. He was the field general for four different pennant-winning teams, a consistent, vocal leader whose durability at the most grueling position in sports became the stuff of legend.

But the defining chapter of Hartnett's Chicago story arrived in the fading light of September 28, 1938. In a neck-and-neck pennant race against the Pittsburgh Pirates, with the game tied in the bottom of the ninth and darkness literally swallowing Wrigley Field, Hartnett stepped to the plate. In what became known as the "Homer in the Gloamin’," he launched a ball into the shadows that didn't just win the game; it broke the Pirates' spirits and delivered the pennant to Chicago. It remains the most cinematic moment in the franchise's history.

The story of "Old Tomato Face" concluded with a series of well-earned honors. Inducted into Cooperstown in 1955, Hartnett’s status as the premier catcher of the pre-war era was set in stone. When the Cubs finally launched their own Hall of Fame in 2021, he was an automatic inaugural inductee. He arrived as a young backstop in a different era of baseball and left as a franchise titan, the man who proved that a catcher could be the greatest hitter on the field.