Pampas XV defeated the Blue Bulls 14–9 in the final in the North West province at Olën Park, Potchefstroom.

[7] Cubelli made his debut in round 1 of the 2016 season against the Hurricanes, scoring a try and helping the team to a 52–10 victory at GIO Stadium, Canberra.

[9] Cubelli scored his third and final try of the 2016 season against Australian Super Rugby conference rivals, the Queensland Reds in round 15 at home once again, and put the scoreline to 34–17 and eventually help the Brumbies to win the match 43–24.

[12][13][14] After being injured during 2017 and not playing many minutes throughout the Brumbies' campaign, Cubelli subsequently left the club for his native Argentina for the following season, signing a contract until the end of 2019.

An important player for Argentina during the 2015 Rugby World Cup, he was second choice scrum-half for most of the tournament behind Martín Landajo, however, Cubelli started in three of the seven games for Argentina, against New Zealand, against Georgia in which cubelli scored a try, and one in the third place match against South Africa in which they were defeated 24–13 at the Olympic Stadium, London.