2009-10: Anthony Florentino played for Xaverian Brothers HS in Massachusetts as a freshman. Xaverian reached the Super 8 tournament.
2010-11: Florentino transferred to South Kent School in Connecticut and also skated for the South Shore Kings in the Empire Junior Hockey League. In 24 games for South Kent he scored 5 goals with 10 assists. South Kent was the top team entering the New England Prep School small school tournament but was upset by 8th-seeded New Hampton in the first round of the tournament. Florentino had 1 assist with 26 penalty minutes in seven games with South Shore.
2011-12: Florentino skated for Neponset Valley in the Massachusetts select league in the fall before returning to South Kent for his junior season. In February he joined the USA U17 team for the 2012 U18 Vlad Dzurilla Tournament in Slovakia and he committed to playing college hockey at Providence in 2013-14. In 12 fall games he scored 1 goal with 6 assists and had a team-high 38 penalty minutes. In 36 games for South Kent he scored 5 goals with 14 assists and in three games at the Vlad Dzurilla tournament he had 2 assists with 4 penalty minutes. The USA U17 team finished first in the tournament. Florentino was selected by Moncton in the 10th round (170th overall) of the 2012 QMJHL Draft.
2012-13: Florentino attended USA Hockey’s Select 17 Development Camp before returning to South Kent and skating for the Select Academy U18 team. Playing in the year-long program, he scored 21 goals with 32 assists and had 68 penalty minutes in 62 games. Select Academy’s U18 team entered the US Elite Hockey League championship weekend as the top seed but after defeating the New Jersey Hitmen in the semifinals lost to the Junior Bruins in the championship game. Florentino was ranked 75th amongst North American skaters in the Central Scouting final rankings and was selected by Buffalo in the fifth round (143rd overall) in the 2013 NHL Draft.
2013-14: Florentino skated in 30 of 39 games for Providence College in his freshman season. He scored 5 goals with 6 assists and was +12 with 16 penalty minutes. The Friars finished third in Hockey East and advanced to the conference tournament semifinals, falling to New Hampshire, 3-1. Providence received an at-large bid to the NCAA East Regional, defeating Quinnipiac, 4-0, before falling to eventual national champion Union College, 3-1, in the regional final.
2014-15: Florentino attended USA Hockey’s U20 evaluation camp in Lake Placid and was one of the eight defensemen invited to the main camp before being one of the squad’s final cuts in December prior to the 2015 World Juniors. Returning to Providence College for his sophomore season, Florentino was paired with junior Tom Parisi — the Friars’ top scorer amongst defensemen — much of the season. Providence finished tied with Boston College for second in Hockey East during the regular season, receiving an at-large bid to the NCAA tournament despite falling to New Hampshire, 2-1 in overtime, in the decisive third game of their Hockey East quarterfinal series. Florentino scored 2 goals with 10 assists and was +9 with 23 points in 36 games heading into the NCAA tournament.
Florentino is a well-rounded prospect who is often praised for his leadership qualities and physical, hard-hitting brand of hockey. He has a heavy point shot that hits the net on a consistent basis. Florentino can skate pucks out of danger from his own zone. His hockey sense and technical skills need further improvement and polishing. Florentino has the prototypical size and attitude of a punishing defender with some skating and technical skills
Florentino skated for Providence College as a sophomore in 2014-15. The Friars were one of the top teams in the country—finishing tied for second in Hockey East with Boston College and receiving an at-large NCAA tournament berth. Florentino's overall game remains a work in progress in terms of consistency and positional play and he will likely spend at least one more season in college before signing a pro contract, but he certainly possesses some top-four potential. Long-term he figures to bring a nice combination of combativeness and skill to the Buffalo lineup and should fit in well with the other young defensemen in the Sabres' system.