Before turning professional, Faulk played for the University of Minnesota Duluth where he set a new school record for most goals by a rookie defenceman and helped them capture the national championship.

[4] Faulk had previously considered playing in the United States Hockey League but felt that the USNTDP would be better for his development.

[3] Faulk spent the 2010–11 season playing for the University of Minnesota Duluth, helping them capture the national championship.

[7] Immediately following the signing, Faulk was assigned to the Hurricanes American Hockey League (AHL) affiliate, the Charlotte Checkers, for the remainder of the 2010–11 season.

[10] After impressing the coaching staff during training camp,[9] Faulk was named to the Hurricanes' opening night roster.

[12] Faulk played in 12 games for the Checkers, tallying four goals and two assists, before returning to the NHL level on November 17.

[14] Upon rejoining the team, he developed chemistry with his defensive partner Jay Harrison and became a prominent point-man on the power play.

[16] Although he was invited to represent Team USA at the 2012 World Junior Ice Hockey Championships, the Hurricanes refused to release him.

[17] His defensive abilities were recognized in January as he was the lone Hurricane player selected to play in the 2012 NHL All-Star Game's YoungStar showcase.

[19] As the Hurricanes failed to qualify for the 2012 Stanley Cup playoffs, Faulk finished his rookie season with eight goals and 14 assists for 22 points through 66 games.

[20] He also led all Hurricanes skaters in average ice time per game and first among NHL rookie defensemen in power-play goals.

[28] He quickly accumulated three goals and seven assists before suffering a second-degree MCL sprain in mid-March after he collided with Jack Skille in a 4–1 loss to the Florida Panthers.

He began the season strong, leading the team in ice time with an average of 24:17 per game as the Hurricanes maintained an 8–5–3 record through October.

[35] Faulk continued to improve through November and finished the month fourth on the team with one goal and four assists for five points through 14 games.

[36] By the start of January, Faulk ranked second among Hurricanes defensemen in scoring with three goals and 13 assists for 16 points through 40 games.

[38] In the first year of his new contract, Faulk experienced a career-best season and set new personal records in goals, assists, and points.

Faulk began the season strong, ranking 16th among NHL blueliners with five goals and 12 assists for 17 points by December 12.

[44] Upon returning from the All-Star Game, Faulk continued to improve on his previous season's totals and ranked eighth among all NHL defensemen in scoring with 44 points by March 11.

[56] Leading up to the 2016–17 season, Faulk was expected to man the Hurricanes top defensive line with Jaccob Slavin.

Although he recovered enough to join the Hurricanes for the start of the regular season, he soon suffered an upper-body injury on November 6 against the New Jersey Devils.

[66] On April 23, 2018, Faulk was nominated for the King Clancy Memorial Trophy as a player who best exemplifies leadership qualities on and off the ice and gives back to his community.

[71] The Blues were eventually eliminated from Stanley Cup contention after losing 6–2 in Game 6 of the Western Conference First Round against the Vancouver Canucks.

During Game 2 against the Colorado Avalanche, forward Nazem Kadri hit Faulk with his shoulder, striking his head.