|Date of birth||8 May 1991|
|Place of birth||Cento, Italy|
|Height||1.92 m (6 ft 3 1⁄2 in)|
|2009–2010||→ Sampdoria (loan)|
|2011–2012||→ Latina (loan)||3||(0)|
|2012||→ SPAL (loan)||1||(0)|
|2012–2013||→ VdA Saint-Christophe (loan)||8||(0)|
|2014–2015||→ Sassari Torres (loan)||2||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 21 June 2015.
Following the appointment of the new board and staff at Juventus at the conclusion of the 2009-10 season, Costantino was one of many new faces brought to Turin. He was signed for about €170,000 in 5-year contract. Ex-Sampdoria head coach Luigi Delneri and sports director Giuseppe Marotta were appointed as the same positions in Juve and played a role in bringing the youngster to Turin. He joined Juventus in order to strengthen the Primavera team but was immediately promoted to the senior squad as their no.1 Italian international Gianluigi Buffon was injured for several months. He was registered in Juventus's 24-men UEFA Europa League first team squad (list A) as the fourth keeper, behind Gianluigi Buffon, former Sampdoria teammate, Marco Storari and Austrian international, Alex Manninger. Juventus also registered young Primavera player Marco Bonassi in B list in qualifying and playoffs phase, but soon left the club on loan. Costantino played most of the games for the "Primavera Squadra".
In July 2011 Marco Costantino was loaned to Latina. He made his debut in 2011–12 Coppa Italia, however he spent most of the time as the backup of Fernando Martinuzzi. In January 2012, he returned to Juventus and was loaned to former club, SPAL 1907, where he served as a back-up for Luca Capecchi. He again returned to Juventus on 30 June 2012, before being loaned out once more to Lega Pro Seconda Divisione outfit, VdA Saint-Christophe on 30 August 2012. WIth the fourth division squad, Costantino made 8 league appearances, serving much of the season as a back-up to Pierluigi Frattali.
On 20 June 2013, Costantino officially completed a permanent transfer to Serie B side for around €244,000 (residual contract value of €92,000 plus profit €152,000), Modena F.C. after a deal was reached with Juventus. The transfer was part of the negotiation the took Nazzareno Belfasti back to Juventus on a permanent basis following his co-ownership deal.
He received some call-up from Italian youth teams but never made a debut.
- "Chi è Marco Costantino, nuovo portierino blucerchiato". UC Sampdoria (in Italian). 14 July 2009. Retrieved 1 October 2011.
- "The UEFA list for the Europa League group phase". Juventus FC. 1 September 2010. Archived from the original on 7 September 2010. Retrieved 3 September 2010.
- "The UEFA list for the Europa League preliminaries". Juventus FC. 23 July 2010. Retrieved 1 October 2011.
- Fullsoccer.eu statistics
- "L'Aquila passa a Latina, addio Tim Cup". Sport Latina (in Italian). 7 August 2011. Retrieved 1 October 2011.
- "Annual Financial Report 30 June 2013" (PDF). Juventus FC. 4 December 2013. Retrieved 31 May 2015.
- "Annual Financial Report 30 June 2014" (PDF). Juventus FC. 21 November 2014. Retrieved 31 May 2015.
- "Under 19, da domenica stage a Roma in vista delle amichevoli autunnali". FIGC (in Italian). Rome. 27 August 2009. Retrieved 3 September 2010.