Aaron Eugene Fletcher (born February 25, 1996) is an American professional baseball pitcher for the Caliente de Durango of the Mexican League.

[5] He pitched for the Hagerstown Suns, Potomac Nationals, and Harrisburg Senators in the Washington organization in 2019, going a combined 5–4 with a 1.79 ERA in 60 innings.

[5] On July 31, 2019, the Nationals traded Fletcher, Taylor Guilbeau, and Elvis Alvarado to the Seattle Mariners in exchange for Roenis Elías and Hunter Strickland.

[9] He made his major league debut the next day, throwing a scoreless inning in relief against the Texas Rangers.

He spent the majority of the year with Triple-A Tacoma Rainiers, making 39 appearances and registering 4-0 record and 3.47 ERA with 45 strikeouts in 49.1 innings pitched.

[14] Following the waiver claim of Alex Young on July 18, Fletcher was removed from the 40-man roster and sent outright to the Triple-A Sacramento River Cats.

[15] He made 15 appearances for Triple-A Sacramento, struggling immensely to the tune of a 15.15 ERA with 12 strikeouts in 13.2 innings pitched.