|Full name||Pedro Waldemar Manfredini|
|Date of birth||7 September 1935|
|Place of birth||Maipú, Argentina|
|Height||1.72 m (5 ft 8 in)|
|* Senior club appearances and goals counted for the domestic league only.
Manfredini began his career with Argentine club Racing Club de Avellaneda in 1957, winning the 1958 Argentine Primera División, and finishing the season as the joint-fourth highest goalscorer, and as his club's top scorer, with 19 goals. After two seasons in Argentina, he subsequently moved to Italian Serie A side A.S. Roma in 1959, where he played for seven seasons. He won the Inter-Cities Fairs Cup with the club in 1961 (the predecessor to the UEFA Cup), finishing as the top scorer of the tournament, with 12 goals. During the 1962–63 season, he was the Serie A top scorer (tied with Harald Nielsen with 19 goals), and he once again finished as the top scorer of the 1962–63 Inter-Cities Fairs Cup, scoring 6 goals throughout the tournament, as Roma reached the semi-finals, losing out to the eventual champions Valencia. He also won the Coppa Italia with Roma during the 1963–64 season, finishing the tournament as top scorer yet again, with 4 goals. In total, he played 130 games for A.S. Roma and scored 76 times. He later spent a season with Brescia and then Venezia before retiring.
Manfredini was capped three times for Argentina, scoring two goals. He took part in the first ever edition of the Copa América in 1959, on home soil, making his debut in the competition, and appearing three times. He scored two goals in a 6–1 win against Chile in the opening match of the tournament, which was also his international debut, helping his country to lift the South American Championship title.
- Serie A top goal-scorer: 1962–63
- Coppa Italia top goal-scorer: 1963–64
- Inter-Cities Fairs Cup top goal-scorer: 1960–61, 1962–63
- "Southamerican Championship 1959 (1st Tournament)". Retrieved 28 December 2014.
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