Though Atlanta United hasn't revealed if Josef Martinez sustained an injury to his left arm during Wednesday's training session, it is possible that, if needed, he can wear a cast while playing.

An MLS spokeswoman said that casts are allowed at the discretion of a referee, as long as it doesn’t present a danger to the player or other players.

Heavy, large casts aren’t allowed. Lightweight casts with padding and no sharp edges are normally acceptable.

The referee would need to examine the cast before the game, typically in the presence of the team doctor or the venue medical director.

Martinez, who has scored 24 goals in 25 games, left Wednesday's training session wearing what appeared to be an air cast on his left arm. 

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Atlanta United forward Emmanuel Latte Lath (left) scores a goal during the Leagues Cup match against the Pumas UNAM at Inter&Co Stadium on Saturday Aug. 2, 2025, in Orlando, Fla. (Mitch Martin/Atlanta United)

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Fulton DA Fani Willis (center) with Nathan J. Wade (right), the special prosecutor she hired to manage the Trump case and had a romantic relationship with, at a news conference announcing charges against President-elect Donald Trump and others in Atlanta, Aug. 14, 2023. Georgia’s Supreme Court on Tuesday, Sept. 16, 2025, upheld an appeals court's decision to disqualify Willis from the election interference case against Trump and his allies. (Kenny Holston/New York Times)

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