Louis Nathan Blair (September 10, 1910 – July 7, 1996) was an American Major League Baseball infielder.
He played for the Philadelphia Athletics during the 1942 season.
In college, Blair was named to the All-Tournament Second Team in the very first SEC Men's Basketball Tournament in 1933.
He was a forward for Louisiana State University which made it to the semi-finals in the tournament.
Blair played on the 1935 team that won the American Legion Bowl in Atlantic City which the team claims the National Championship for.