|Full name||Pietro Sante Arcari III|
|Date of birth||2 December 1909|
|Place of birth||Casalpusterlengo, Italy|
|Date of death||8 February 1988(aged 78)|
|Place of death||Cremona, Italy|
|Height||1.75 m (5 ft 9 in)|
|*Club domestic league appearances and goals|
Born in Casalpusterlengo, Province of Lodi, he played in the 1930s for A.C. Milan, and Genoa. A prolific goalscorer, known for his speed and ability in the air, he played 256 matches in Serie A, scoring 80 goals.
In the 1933–34 season, he scored 16 goals for Milan, finishing the season as the fifth highest scorer in Serie A, leading to his selection by manager Vittorio Pozzo to the national team for the 1934 FIFA World Cup on home soil. Italy won the title, although Arcari did not make a single appearance throughout the tournament; consequently, he is one of only four players in Italian national team history to become World champion while never being capped.
While Pietro's most notable success came at Milan, an unusual incident occurred while playing for Genoa in 1937. During a Fiorentina-Genoa match won 2–1 by Genoa in Florence the linesman called a nonexistent offsides on Arcari; the referee Caironi, without hesitation sent his colleague to the locker room, who was quickly replaced. That season, he won the Coppa Italia, as Genoa defeated Roma 1–0 in the final, played in Florence, on 6 June 1937; en route to the final, he eliminated his former club Milan in the semi-finals of the competition.
Pietro was the third son in a family of footballers: his older brothers Carlo Arcari and Angelo Arcari and younger brother Bruno Arcari all played football professionally. To distinguish them, Carlo was referred to as Arcari I, Angelo as Arcari II, Pietro as Arcari III and Bruno as Arcari IV. His brother Bruno, who also played for Milan throughout his career, even made an appearance for the national team.
- "Sante Pietro ARCARI (III)" (in Italian). magliarossonera.it. Retrieved 31 March 2016.
- "1934 Italia: Capitolo VII: Ritratti dei Campioni del Mondo" (in Italian). Storie di Calcio. Retrieved 31 March 2016.
- "Arcari, Pietro" (in Italian). FIGC. Retrieved 31 March 2016.
- Marco Liguori (16 August 2013). "Il racconto del trionfo in Coppa Italia nel 1937: battuto il Milan, Grifone in finale con la Roma" (in Italian). Pianeta Genoa 1893. Archived from the original on 21 April 2016. Retrieved 31 March 2016.