John "Jac" Weller (January 6, 1913 – August 18, 1994) was an American college football player, firearms expert and military historian. He was a consensus All-American in 1935 at the guard position. He played for Fritz Crisler's Princeton Tigers football team at Princeton University that went 25–1 during Weller's three years on the team. Weller later became known as a firearms expert and published several works on munitions and military history.
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