|Date of birth||17 March 1983|
|Place of birth||Como, Italy|
|Height||1.83 m (6 ft 0 in)|
|2002–2003||→ Viterbese (loan)||24||(0)|
|2003–2004||→ Prato (loan)||30||(1)|
|2006–2007||→ Chievo (loan)||32||(2)|
|2009–2010||→ Udinese (loan)||26||(0)|
|2011||→ Cesena (loan)||15||(1)|
|2011–2012||→ Chievo (loan)||28||(2)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 10 August 2012.
† Appearances (Goals).
A product of European giants A.C. Milan's youth system, Sammarco never played a game for the side, serving consecutive loans: from 2002–04 in Serie C1, and from 2004–07 with first division side A.C. ChievoVerona (the first two in joint ownership, exchanged with Martino Olivetti).
On 22 June 2007, U.C. Sampdoria announced Sammarco, in another co-ownership deal with Milan, for €1.5 million. In Sampdoria, he broke through, playing almost every league game in a team that achieved UEFA Cup qualification, under coach Walter Mazzarri.
In June 2008, Sampdoria gained full ownership of Sammarco for another €2.5 million, made his valued increased to €4 million (made Milan register a financial income of €1million as the half retained had increased from €1.5 million to €2.5M)  Sammarco also signed a new contract which last until 30 June 2013 during 2009–10 season. On 25 August 2009 he was loaned to Udinese for one season. Sammarco was a sub under Luigi Delneri at the first match of 2009–10 Serie A.
On returning to Sampdoria for the beginning of the 2010–11 season, he did not appear in any games, as the club now hired Domenico Di Carlo as coach. He was loaned to Cesena on 30 December 2010 for the rest of the season.
Sammarco was first capped for the Italy national under-21 football team in August 2005, against France, and was part of the final squad in the 2006 European Championship, making three appearances as a starter.
- UC Sampdoria. "Sammarco joins Samp midfield" (in Italian).
- "AC Milan Group 2008 Annual Report". AC Milan (in Italian). ca. April 2009. Retrieved 11 June 2011.
- UC Sampdoria Report and Accounts on 31 December 2009 (Italian)
- "Tomorrow, Paolo Sammarco will join the group" (in Italian). AC Cesena.