2008-09: Bill Arnold skated for the Little Bruins prior to the high school season and tied for the team lead in scoring for Nobles and Greenough (Mass.). He scored 26 goals with 21 assists in 33 games for the Little Bruins. In 29 games with Nobles and Greenough, he scored 28 goals with 27 assists.
2009-10: Arnold played for the US NTDP team that competed in the USHL this season. In 26 games, Arnold scored 8 goals and added 15 assists for 23 points. He posted a +15 rating for the season.
2010-11: Arnold had a very good freshman season at Boston College, scoring ten goals with ten assists and a plus ten rating in 39 NCCA (HE) games. He centered the Eagles' third line while being used on both the power play and penalty kill units by the season's end. The freshman was named to the NCAA (Hockey East) All-Rookie Team for the 2010-11 season.
2011-12: Arnold was one of the top forwards for NCAA champion Boston College as a sophomore and was impressive playing for the USA at the 2012 U20 World Junior Championship. He scored 17 goals with 19 assists and was plus-16 with 46 penalty minutes in 42 games for the Eagles. Boston College won its final 19 games; capturing the Hockey East regular season and playoff titles and defeating Ferris State, 4-1, in the Frozen Four Final. Arnold was one of the few forwards to stand out for the USA team; scoring 3 goals with 3 assists in seven games for a team that finished seventh.
The hard-working center can play the defensive shutdown role but also puts up solid offensive numbers by driving hard to the net in the attacking zone. Arnold is a physical two-way center with great character and an excellent work ethic. The solidly built forward has greatly improved his skating and can play on both specialty teams. He has the hockey smarts to exploit his opponents’ weaknesses and recognize where his highly talented wingers are on the ice. Arnold projects as a top-nine forward with some offensive upside at the NHL level.
Arnold has returned to Boston College for his junior year where he plays on one of the top two lines for the Eagles. The hardworking center is expected to help lead BC's offense but still play solidly in the defensive zone as well.