Armando Castellazzi (Italian pronunciation: [arˈmando kastelˈlattsi]; 7 October 1904 – 4 January 1968) was an Italian professional footballer and manager who played as a midfielder.

Born in Milan, Castellazzi spent his entire club career in the 1920s and 1930s playing for Ambrosiana-Inter in Serie A. He played 261 match in all competitions for the team, scoring 16 goals, helping the club to win the 1929–30 Serie A championship.^[1] His club debut came on 6 October 1929, in a 2–1 away win over Livorno.

With the Italy national team, Castellazzi made three appearances between 1929 and 1934; he made his international debut on 1 December 1929, in a 6–1 friendly home win over Portugal in Milan, and later appeared in a 4–2 friendly home win over Switzerland in Rome, on 9 February 1930. He also made one appearance – his final international cap – in the team's victorious 1934 FIFA World Cup campaign on home soil, starting in the first quarter-final against Spain, held in Florence, on 31 May, which ended in a 1–1 draw.^[2]

After retiring from football at the age of 32, Castellazzi remained with the Ambrosiana-Inter organization where in 1938 he became the first person in the history of the first division to win the championship both as a player and as a coach.

Source:^[3]

Ambrosiana-Inter

• Serie A: 1929–30

Italy

• FIFA World Cup: 1934

Ambrosiana-Inter

• Serie A: 1937–38

• Profile at Enciclopedia del Calcio (in Italian)
• Profile at FIGC (in Italian)
• La Gazzetta dello Sport (in Italian)