Avengers 4 is seeking a "fit model" - a costuming stand-in for an actor - for its ongoing reshoots, according to Atlanta ABC affiliate WSB-TV.
Marvel Studios is reportedly seeking an "African-American male, 5’9" and 300 pounds." Those auditioning "should wear size 52x32 pants and a size 11 shoe."
That's a specific description, likely meant to match an actor already cast in the film. WSB's report does not include any character details or indication of which actor, if any, the model is meant to stand in for.
Avengers 4 is currently undergoing reshoots at Atlanta's Pinewood Studios for a planned May 3, 2019 theatrical release.