| Welcome Gaston | |
| Width: | 200px |
| Position: | Pitcher |
| Bats: | Unknown |
| Throws: | Left |
| Birth Date: | 19 December 1874 |
| Birth Place: | Senecaville, Ohio |
| Death Place: | Columbus, Ohio |
| Debutleague: | MLB |
| Debutdate: | October 6 |
| Debutyear: | 1898 |
| Debutteam: | Brooklyn Bridegrooms |
| Finalleague: | MLB |
| Finaldate: | September 25 |
| Finalyear: | 1899 |
| Finalteam: | Brooklyn Superbas |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 1–1 |
| Stat2label: | Earned run average |
| Stat2value: | 2.84 |
| Stat3label: | Strikeouts |
| Stat3value: | 0 |
| Teams: | |
Welcome Thornburg Gaston (December 19, 1874 – December 13, 1944) was an American pitcher in Major League Baseball. He played for the Brooklyn Bridegrooms/Superbas during parts of the 1898 and 1899 seasons.