The initial triumphs

The direction of the Club was now drawn: drawn in Victory. Sporting would win its first Lisbon Championship in Football, fourth division, in 1912. Sporting would go on to win the honorary division in 1915, together with the Honorary Cup, with a victory over Benfica in the final (3-1). The Lisbon Championship in 1915 was the first in a long series that Sporting would claim. A series that saw Sporting claim 19 Championships between 1915 and 1947: when the championship came to an end. 1915 Also saw the teams of Sporting begin to use black socks to accompany the "Stromp" shirt.

Laranjeira Guerra won the Porto-Lisboa cycling race in 1912, an event that, at the time, was an epic. That victory laid the foundation for the success of cyclists such as Alfredo Trindade, João Roque, Leonel Miranda, Marco Chagas and, the greatest of them all, Joaquim Agostinho. Claiming third place in the Tour de France and a second place in the Tour of Spain - without mentioning his countless victories in Portugal - transformed Agostinho into one of Sporting's immortal symbols.

In a sport that was very much in the vogue at the time, Tug-of-War, Sporting Achieved a level of immeasurable success in never being beaten in competitive meetings.

1912 would see more success for Sporting's Athletes as the highly versatile António Stromp would shine in the 100m (reaching the fourth round) and the 200m in the Olympic Games held in Stockholm: Games that proved fatal to the Portuguese marathon runner Francisco Lázaro. António Stromp was Sporting's first Olympian and he would place Sporting on a path that would see the Club become the most successful Olympic Club of the country, both in the number of representatives the club has produced as well as the number of medals won. Also in 1912, Sporting would win its first in a long series of National Championships in Cross Country.
 
In 1917, Sporting changed facilities. José Alvalade had build 'Stadium de Lisboa' in 1914, but a difference in opinions between the founder and the Board elected in 1916 led those responsible to seek other solutions. As a result, 412 Campo Grande was leased out; which was the pitch where Lisboa F.C, a team that no longer exists, had been playing. Major improvements to the site were made by architect António do Couto, with the complex going on to be Sporting's home for the following 30 years. Following Sporting's eventual move from the site, Benfica played there for a few seasons after Sporting, in a gesture of solidarity, had granted its use when Benfica moved from their old site in Amoreiras. This site would become commonly known as the "timber-yard".