He settled into their half-backs with the latter from the age of 17 and took an active part in the success of the club which he led to integrate the elite of the French Rugby Union Championship at the end of the 1920s.

[8] During the 1924-1925 season, before celebrating his twenties, he took the role of captaincy of CS Oyonnax from G. Orfidan and now successfully [9] organized the game around him[10] despite not qualifying to compete in the French Championship.

[11] The following year, in March 1926, he was called up to join the French army team while he was serving in the 47th artillery regiment, where he met Joseph Pascot, Yves du Manoir and Raoul Bonamy[12] and he make a game noticed by observers despite the defeat against their English counterparts.

[17] The start of the 1926-1927 season confirms the efficiency and the attraction of the hinge of Oyonnax composed of C. Mathon and G. Orfidan who constitute the soul of this team.

[32] He also finds the selection of the Lyonnais where he is also cited as one of the best players by showing himself to be the initiative of many attacks,[33] and was finally called up at the end of 1929 to the national team to play friendly matches and position himself as a possible international.

[34] The Oyonnax club rose in power that season at the start of 1930 and achieved performances noticed by the press, with a hinge experienced C. Mathon-G Orfidan.

[36] 1930-1931 is the season chosen by C. Mathon to leave CS Oyonnax and join US Bressane de Bourg-en-Bresse[37] which is also competing in the Lyonnais Championship.

[39] He accompanies the club in the French Championship, eliminated in the poule des cinq by the SU Agen, the US Dax et the CS Vienne.

[41] During the following match, in Brive-la-Gaillarde, he was then put into the halfback and rubbed shoulders on the field Max Rousié, Jean Galia, Marius Guiral et Joseph Choy.

[45] He took part in the French Championship where the club was eliminated in poule de cinq against the US Thuir, the US Quillan, the Racing CF et the FC Oloron.

On the French team side, Max Rousié started alongside Antonin Barbazanges on 17 4 1932 against the Germany, letting C. Mathon on the bench.

[47] Charles Mathon, having experienced many canvassings from upscale clubs such as Stade Français during his career, hears and shares these same arguments around this general hypocrisy.

[48] C. Mathon then reported in the press on numerous proposals by Lyon clubs, including the double-champion of France in 1932 and 1933, Lyon OU, which to bring him to play did not hesitate to offer him significant financial advances and jobs,[49] accusations immediately denied by the club cited[50] while its recent success is due to the recruitment of many players from the South of France and surrounding areas.