Fabbro, 20 (6/20/98), set career highs in points (33) and assists (26) with Boston University during his junior season in 2018-19, en route to being named a Hockey East Second Team All-Star for the second consecutive campaign. The 6-foot-1, 193-pound blueliner's point total is tied for 10th among all NCAA defenseman and he is the only collegiate player to record at least 30 points (33) and 80 blocked shots (82) this season. A co-captain this season, Fabbro posted two separate five-game point streaks and tied a Terriers record for most points in a game with five (1g-4a) on March 2 vs. Merrimack, which earned him Hockey East Co-Player of the Week honors. In 111 games with the Terriers from 2016-19, Fabbro posted 80 points (22g-58a), the most among team defensemen in that span.

Originally drafted in the first round (17th overall) of the 2016 NHL Draft by the Predators, Fabbro has represented Canada multiple times at the international level, most recently at the 2018 Spengler Cup, where he was named to the All-Tournament Team. He served as an alternate captain and won the Gold Medal with Canada at the 2018 World Junior Championship, earned silver the 2017 edition of the tournament and led all defensemen at the 2016 U-18 World Championship in assists with eight in seven contests. Prior to enrolling at Boston University, he spent two seasons with the BCHL's Penticton Vees, helping his team win the Fred Page Cup in 2015. He was named the BCHL's best defenseman in 2015-16 after leading all league blueliners in scoring with 67 points (14g-53a) and was named a First Team All-Star.

Fabbro, who grew up a fan of the Predators, has two sisters, Gina and Sophia, who played soccer at Austin Peay State University in Clarksville, Tennessee.