Baker sustained the concussion during a tag team match at Fight For the Fallen last month in Jacksonville, while teaming with Riho against Bea Priestley and Shoko Nakajima.
Said Baker via Twitter, "CLEARED and ready to win this Casino Battle Royale at #AllOut!"
Baker becomes the eighth entrant for the women's Casino Battle Royale, which takes place on the Buy-In pre-show. The winner of the 21-entrant gauntlet will advance to the match that determines the company's first Women's champion, which takes place on October 2, at AEW's first TNT show.
Other entrants confirmed for the match include Nyla Rose, Yuka Sakazaki, Brandi Rhodes, Teal Piper (daughter of Roddy), Allie, Ivelisse Velez, and Jazz, with 13 more to be named.
Baker holds the distinction of winning the first women's match in AEW's history, a four-way battle over Rose, Kylie Rae, and Awesome Kong.