|Date of birth||10 April 1987|
|Place of birth||Crema, Italy|
|Height||1.77 m (5 ft 10 in)|
|2007||→ Padova (loan)||12||(0)|
|2007–2008||→ Spezia (loan)||10||(1)|
|2009||→ Parma (loan)||5||(1)|
|2010||→ Brescia (loan)||2||(0)|
|2010–2011||→ AlbinoLeffe (loan)||0||(0)|
|2011–2012||→ Frosinone (loan)||8||(0)|
|2012–2013||→ Gubbio (loan)||8||(0)|
|* Senior club appearances and goals counted for the domestic league only.
Manzoni made his senior debut for Atalanta in a Serie B match towards the end of the 2005–06 Serie B season. The game ended 1–0 to Modena. Since then, Manzoni has been on loan at both Padova and Spezia.
In February 2009, he left for Parma in temporary deal. In summer 2009 Manzoni was signed by Parma in 3-year contract for €1.5 million (counter-weight Luca Cigarini transfer fee); Atalanta also retained 50% registration rights. Since January 2010 Manzoni was farmed to various clubs in Serie B and Lega Pro Prima Divisione. In June 2011 Atalanta gave up the remain half of the "card" to Parma.
In July 2012 Manzoni was signed by Gubbio. That season Parma signed Daniele Bazzoffia for undisclosed fee and Mário Rui for €595,000 from Gubbio; Gubbio signed Manzoni, Pietro Baccolo, Jacopo Galimberti and Francesco Pambianchi in temporary deals, subsidized by Parma by performance bonuses (Italian: premi di valorizzazione). Eventually Gubbio received €548,000 from the loan of Manzoni, Baccolo and Galimberti.
- FIGC (in Italian)
- "PARRAVICINI ALL'ATALANTA MANZONI E D'AGOSTINO AL PARMA" (in Italian). Atalanta BC. 2009-02-02. Archived from the original on February 6, 2009. Retrieved 2009-02-02.
- Parma FC SpA financial report and accounts (bilancio) on 30 June 2010, Require purchase in Italian Chamber of Commerce (in Italian)
- "CALCIOMERCATO, ARRIVANO MANZONI E BACCOLO" (in Italian). Frosinone Calcio. 14 July 2011. Retrieved 20 October 2013.
- Parma FC SpA financial report and accounts (bilancio) on 30 June 2011, Require purchase in Italian Chamber of Commerce (in Italian)
- "Prima amichevole in famiglia" (in Italian). AS Gubbio 1910. 23 July 2012. Retrieved 20 October 2013.
- "Presentata la squadra per la nuova stagione" (in Italian). AS Gubbio 1910. 31 July 2012. Retrieved 20 October 2013.
- Parma FC SpA bilancio (financial report and accounts) on 30 June 2013, PDF purchased from Italian C.C.I.A.A. (in Italian)
- "UFFICIALE: Manzoni al Pavia". Tutto Lega Pro (in Italian). TMW Network. 13 November 2013. Retrieved 4 March 2015.
- Atalanta B.C. Official Player Profile(in Italian)