Pat "Irish" O'Connor (born 1950) is a former professional light heavyweight boxer from Rochester, Minnesota.
O'Connor ran his record to 12-0 before facing his first "name" opponent, fellow Minnesotan Duane Horsman.
Despite breaking his hand during the bout, O'Connor outboxed Horsman for six rounds en route to a unanimous decision win.
O'Connor would continue to win through the summer of 1972, finally suffering his first loss after 31 consecutive victories when Andy Kendall defeated him by technical knockout in the seventh round of a ten-round match.
Despite the setback, O'Connor continued to fight regularly until March 1978, when he finally retired after losing three bouts in a row.