[2] In October 2023, Buntz won the 2023 CDC Continental Cup to secure his place at the 2023 Grand Slam of Darts.

[5] In November, Buntz was drawn into Group E with Peter Wright, Dave Chisnall, and Stephen Bunting.

[6] His debut match on his first televised major event was against former two-time world champion Peter Wright, where he won 5–1.

[12] In the last 16, Buntz defeated the runner-up of Group F, Andrew Gilding, 10–5 before exiting the tournament at the quarterfinals in a rematch against Stephen Bunting, losing 16–8.

[13][14] At the 2024 PDC World Darts Championship, Buntz played Kevin Doets in the opening match of the tournament, with the winner to face defending champion Michael Smith in the next round.