Con O'Brien (American football)

Cornelius O'Brien (May 8, 1898 – December 1, 1993) was a professional football player. He played in the National Football League (NFL) in 1921 with the New York Brickley Giants and in first American Football League (AFL) with the Boston Bulldogs in 1926.

An immigrant from Ireland, O'Brien grew up in Boston and later played college football at Boston College before signing to the NFL.