[2][3] In April 2016, the media announced that Fletcher would be joining the cast of The Fosters in a recurring guest-starring role as Aaron, an "attractive and intriguing law student" and potential romantic interest of Callie (Maia Mitchell).

He plays Trevor, a trans man who works for an organization that helps find homes for runaways and homeless LGBT+ teens.

[7][8] In 2019, Fletcher played the character Max in multiple episodes of the third and final season of the Hulu original series Marvel's Runaways.

[9] In 2020, Fletcher was added to the main cast of the post-apocalyptic FX on Hulu show Y: The Last Man.

Fletcher's character, Sam Jordan, is a transgender man navigating a world without cisgender men.