João Mendonça Azevedo (Barreiro, 10 July 1915 - Barreiro, 4 January 1991) was one of Portugal's best football goalkeepers. He used a trademark cap while playing.
Azevedo started at the youth categories of Barreirense, where he would play from 1930/31 to 1932/33. He played for the two seasons after at Luso Barreiro, before finally moving to Sporting Clube de Portugal, in 1935/36. He would represent Sporting until 1951/52, for decade and a half, winning several National Champion and the Cup of Portugal titles. After a season outside the field, Azevedo spent a final season at Oriental, in 1953/54.
He earned 19 caps for the Portuguese national team, debuting on 28 November 1937 in the 1–2 loss to Spain. He played at the 1938 World Cup qualification match, a 0–1 loss to Switzerland which meant that Portugal would miss the final tournament. João Azevedo ended his international career on 23 November 1947, with a 2–4 defeat to France.
In November 1946, in a game with Benfica, he broke an arm, but played the rest of the game after 22 minutes of the second half, with only the help of the other arm. Sporting would win 3-1.
After finishing his career he worked as a taxi driver. He latter moved to London, England, where he would work as a college chauffer. He returned to Portugal in 1982. He died in his hometown of Barreiro, aged 75 years old.