- the player whose position is third base.
Origin of third baseman
An Americanism dating back to 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for third baseman
Fleetwood, the Hartford third-baseman, took his turn at the stick.Frank Merriwell's Reward
Burt L. Standish
Ken imagined what the third-baseman would have said if the coach had not been present.
Ken had tried with all his might to feel friendly toward the third-baseman.
But he rapped the next like a bullet at Griffith, the third-baseman.
He dismissed the third-baseman and his scheming from mind, and believed Reddy as he had believed Arthurs.