2008-09: Played 5 games for the South Shore Kings of the EJHL, netting 2 goals and adding 7 assists for 9 points.
2009-10: In his first full season with the Kings, Coyle played in 42 games for that club. He scored 21 goals and added 42 assists for 63 points while picking up 50 penalty minutes. In 4 playoff games for the Kings, Coyle scored 2 goals and added 1 assist. Coyle received the John Carlton Award, which is given to the outstanding male athlete in a junior hockey program. Named the EJHL Rookie of the Year for 2009-10. Coyle is the nephew of former NHL player Tony Amonte. Drafted in the first round (28th overall) of the 2010 NHL Draft by the San Jose Sharks.
2010-11: Coyle skated in 37 of 39 games for Boston University as a freshman and represented the USA at the 2011 U20 World Junior Championship. Coyle was named Hockey East Rookie of the Year after scoring 7 goals with 19 assists and finished with an even plus/minus and 34 PMs. The Terriers finished third in Hockey East but did not receive an NCAA bid after falling to Northeastern in the Hockey East quarterfinals. In six games for third-place USA at the junior tournament Coyle scored 2 goals with 4 assists and was +1. The Wild acquired the rights to Coyle in a multi-player, draft day deal with San Jose in June 2011.
2011-12: Coyle skated in 16 games for Boston University as a sophomore before leaving school in December to join the Saint John Sea Dogs (QMJHL).. He scored 3 goals with 11 assists and was plus-seven with 20 penalty minutes for the Terriers. He competed at the 2012 U20 World Junior Championship, sharing the goal scoring lead for seventh-place USA at the WJC with Nick Bjugstad (4 each). He was was plus-two with 1 assist and 2 penalty minutes in six games. After skating for the United States, he played 23 regular season games for Saint John and scored 15 goals with 23 assists and was plus-23. The Sea Dogs finished with the QMJHL's best record and captured the playoff championship. Coyle was named the playoff MVP after scoring 15 goals with 19 assists and finishing plus-27 in 17 playoff games. In four games at the Memorial Cup he had 4 assists and was plus-four as Saint John finished 2-2 in the tournament; losing to QMJHL-rival Shawinigan in the semifinal game.
“He’s a big kid,” South Shore Assistant Coach Ken Frates told HF. “He’s a powerful skater, a strong skater, and he can protect the puck real well along the boards.”
Coyle decided to leave Boston University this season and is now playing with the Saint John Sea Dogs of the QMJHL. Coyle had a good showing at the World Junior and seems poised to make the jump to professional hockey next season. He has the size and speed to compete with professionals, but the number of rookie spots on the Wild may be limited.