2009-10: J.T. Miller, a graduate of the Pittsburgh Hornets Midget program, played for the U.S. NTDP squad competing in the USHL. In 29 games, he scored 5 goals and added 7 assists for 12 points to go along with 32 penalty minutes. In 46 games for the U-17 squad, Miller scored 15 goals and added 16 assists for 31 points to go along with 79 penalty minutes. Miller played for the USA at the World Under-17 Hockey Challenge, scoring 5 goals and adding 4 assists for 9 points in 6 games for the gold medal winners.
2010-11: Miller again played for the U.S. NTDP squad playing in the USHL. In 21 games, he scored 3 goals and added 12 assists for 15 points to go along with 48 penalty minutes. Miller played for the USA's gold medal team at the 2011 U-18 World Junior Championship, scoring 4 goals and adding 8 assists for 12 points in 6 games. Miller committed to the University of North Dakota, but has instead decided to play for the OHL's Plymouth Whalers.
2011-12: Miller made his pro hockey debut as a 19-year-old, joining Connecticut for the AHL playoffs following his first season with OHL Plymouth. He played in 8 AHL playoff games for the Whale and had 1 assist and was minus-two with 2 penalty minutes. Miller scored 25 goals with 37 assists in 61 games on a Plymouth team that was second in the OHL with 279 goals and he was plus-eight with 61 penalty minutes. The Whalers finished first in the West Division and reached the second round in the OHL playoffs. Miller scored 2 goals with 8 assists in 13 playoff games and was minus-three with 18 penalty minutes. He represented the USA at the 2012 U20 World Junior Championships; scoring 2 goals with 2 assists in six games as the USA finished seventh.
Miller is an excellent two-way player, with some offensive upside. A good face-off man, he plays well along the boards and in tight areas.