- 2021 FIM Motocross World Championship MXGP 14th place
- 2020 FIM Motocross World Championship MXGP 16th place
|Date of Birth:||June 24, 1996|
|Year Turned FIM Pro:||2014|
Calvin Vlaanderen News
- September 28, 2022 Matthes weighs in on some muddy international race that went down over the weekend in Michigan.
- September 26, 2022 Recapping the final day of action from the 75th Monster Energy FIM Motocross of Nations in Michigan.
- September 25, 2022 Live updates all day long from the muddy 2022 Monster Energy FIM Motocross of Nations.