NHL clubs had until 5 pm on Sunday to sign prospects drafted from the OHL, WHL, or QMJHL at the 2023 NHL Draft or players selected from European leagues (other than the KHL) in 2021 or they would lose their exclusive rights to them. The Buffalo Sabres had three players that met that criteria and failed to sign forwards Ethan Miedema, Viljami Marjala, and William Von Barnekow.
