In 2021-22, the 6-5, 215 pound defenseman was the only Ranger to play in all 82 games. That season, Miller ranked third on the team in plus/minus rating (23), TOI/GP (20:36), takeaways (59), and third among defensemen in goals (7), assists (13), and points (20). During his rookie campaign in 2020-21, he registered 12 points (5G-7A) in 53 games and was named to the NHL's All-Rookie Team. Miller averaged 21:07 of ice time per game in 2020-21, which was the most by a Rangers rookie in a season (min. 30 games played) since the NHL began to track ice time in 1997-98.