Matthew Farrelly is an Australian wrestler signed to WWE, where he performs on the SmackDown roster under the ring name Grayson Waller.

Previously, Farrelly wrestled from 2017 to 2021 on the independent circuit as Matty Wahlberg.

On the NXT New Year's Evil special episode on January 10, 2023, Waller then faced Breakker for the NXT Championship but was defeated by count-out after the second ring rope broke.

On the February 4 NXT Vengeance Day, Waller faced Breakker again for the NXT Championship in a Steel Cage match but was defeated. On April 1, at NXT Stand & Deliver, Waller was defeated by Johnny Gargano (from the Raw roster) with whom he had been feudin