Tomas Walsh is a New Zealand athlete who competes mainly in the shot put. He is the current national record holder both outdoors and indoors for the event. His personal best of 22.90 m, set in Doha, 5 October 2019, is also the Oceanian record and makes him the sixth best shot putter in history.

The shot put is a track and field event involving "putting" (throwing) a heavy spherical ball—the shot—as far as possible. For men, the sport has been a part of the modern Olympics since their revival (1896), and women's competition began in 1948.