The Instagram account revealed that Boyd Holbrook will play Donald Pierce in Wolverine 3; Pierce was a notoriously formidable cyborg villain in the MCU, who was a member of the Hellfire Club's Inner Circle. After Pierce is beaten by the X Men he goes on to lead the cyborg group, The Reavers.
Pierce might be one of two badass villains for this film though, as we've previously confirmed that Richard E. Grant is playing a mad scientist who might be potentially be Mister Sinister. Logan's being directed by James Mangold who directed The Wolverine, and it stars Hugh Jackman as Wolverine, Patrick Stewart as Professor X, Boyd Holbrook as Donald Pierce, Richard E. Grant, Stephen Merchant as Caliban, Eriq La Salle and Elise Neal.