Amechazurra was one of the most important figures in the amateur beginnings of FC Barcelona, serving as its captain for 5 years between 1909 and 1914, and thus playing a crucial role in Barça's huge sporting success of the early 1910s,[6] winning four championships in Catalonia, three Copa del Reys in Spain and four Pyrenees Cups in a row.

After his move and after he settled in Barcelona as a young man, he began playing football at his local club FC Irish in 1902.

Together with Carles Comamala, Amechazurra was the fundamental head behind piece in Barcelona's first great team, which also had the likes of Paco Bru, Alfredo Massana, the Wallace brothers (Charles and Percy), Pepe Rodríguez and Barcelona's second all-time leading goal-scorer and countryman Paulino Alcántara, but it was Amechazurra who was named the team's captain.

No one disputed this decision in a time when the captain had the duty of dictating the tactics to be followed (since the coach as we know him today did not exist back then) and who had to make up the line-ups and game plans.

Thanks to his English speaking abilities and his connections in England, the first anglophone players and coaches arrived at Barça, William Charles Lambe, Jack Greenwell, Frank Allack and Alex Steel.

Amecha's first game at the tournament begun with a 0-3 loss, against Filipinos' rivals China, which saw a brawl break out leading to a full-scale battle and members of the crowd were also involved.

Amecha, however, knew he would've reffed a game between two teams, whose rivalry started since the beginning of the tournament in 1913 and as it happened in the previous editions, especially in 1923 when he coached the Philippines, it was a rough and violent match.

For the Chinese, Amechazurra judged the game as a "home town" referee, him being born in the country, allowing some brutal fouls and not awarding them a penalty when Filipino defender Cirilo De Guzmán handled the ball.

In 1916, when he returned to his "home" country, in the Philippines he went to Manila where he kicked-off his acting career and founded the Teatro Español de Filipinas, as well as being a stage director.

[4] His grandson Gerardo Amechazurra is an actor, presenter, cartoonist designer and was one of the creators of the successful children's and youth program on Spanish Television "La Bola de Cristal" (1984-1988).