|1.||2010||Colnago - CSF Inox||50||689|
|2.||2011||Colnago - CSF Inox||81||585|
|3.||2012||Colnago - CSF Inox||134||441|
|4.||2013||Bardiani Valvole - CSF Inox||212||312|
Stefano Pirazzi (born 11 March 1987) is an Italian professional road bicycle racer who last rode for UCI Professional Continental Team Bardiani–CSF. Born in Alatri, Pirazzi has competed as a professional since 2010, joining Colnago–CSF Inox from the amateur ranks; his twin brother Roberto is also a cyclist, and was also a member of the Palazzago Rad Logistica team with Stefano in 2009.
In May 2017, one day before the start of the 2017 Giro d'Italia, the UCI announced that Pirazzi and Bardiani–CSF team-mate Nicola Ruffoni had tested positive for growth hormone-releasing peptides in out-of-competition controls carried out the previous month. Later that month the UCI confirmed that both riders' B-samples had also tested positive, leading Bardiani-CSF to confirm that they would terminate both riders' contracts.