After not being considered by Independiente's coach Antonio Mohamed in July 2011 Mancuello was loaned to Club Atlético Belgrano for one year.

[2] In January 2012 Mancuello suffered an injury in a match of the Copa Argentina which kept him out of the fields for several weeks when he was being a key player of his team.

[5] After scoring 10 goals in 19 games in the 2014 season, Argentina manager Gerardo Martino stated that he would keep Mancuello in mind for future call-ups.

[7] In the first half of the season Mancuello didn't perform as expected due to some injuries, playing all of his 12 matches as a starter and scoring 3 goals.

[8] On 28 August 2016, against Chapecoense, he substituted Éverton on the 62nd minute and scored his second Série A in the injury time, Flamengo won the match 3–1 at Arena Condá.