[5] He began his football career in Paris in the ranks of the Lycée Charlemagne team (the Carolingian Union), in 1905, and despite his tender age of 17, he was already well-built and of a good height, thus playing as a center forward.

[5] Later that year, in October 1908, Dastarac was selected for the so-called France B squad that competed in the football tournament of the 1908 Olympic Games in London, in which they were knocked out in the quarter-finals by Denmark (0–9).

[5] Despite this, Dastarac was re-selected to play in the Paris-North match of 1909, as well as Paris-London in January 1910, in which he was described as France's best player, "serving Verbrugge and Cyprès quite intelligently".

[5] The French press noted his absence in the final, since it weakened Gallia's half-back line in an eventual 1–3 loss to CA Paris.

[5][8] Later that year, on 4 October 1910, Dastarac appeared before the review board of the military, but he was discharged because of "Pulmonary bacillosis, with considerable weight loss and general weakness".