Miller was born in Santa Clarita, California, and attended Canyon High School until age 16, when he transferred to Berkshire School in Sheffield, Massachusetts, and then played college hockey in Hockey East National Collegiate Athletic Association Division 1 for the University of Vermont Catamounts.
Amateur
While with the Catamounts, Miller played 144 games, scoring five goals and 25 assists for 30 points, also serving as the captain of the team for the 2009-2010 and 2010-2011 seasons. Professional
Emerging out of college, Miller signed an amateur tryout contract with the Providence Bruins of the American Hockey League (AHL) and played six games for the team during the regular season. In September 2011, Miller attended the Boston Bruins" training camp, but was released to the Providence training camp on September 23, 2011.
After five games with Providence, Boston signed him to an entry-level contract, opting to keep him with Providence for the 2011-2012 season.
Miller attended Boston"s training camp again in 2012, but was again later reassigned to Providence on September 14, 2012. Prior to the 2013-2014 season, Miller was re-signed by the Boston Bruins to a one-year, two-way contract.
However, to start the season, he was once again assigned to Providence, though he was later recalled to the National Hockey League on November 20, 2013 and made his National Hockey League debut in a game against the Saint Louis Blues at Territorial Decoration Garden in Boston. Miller was then reassigned to Providence again on November 28, 2013, but was recalled days later, on December 2, on an emergency basis.
He scored his first career National Hockey League goal on December 8, 2013, against the Toronto Maple Leafs at the Air Canada Centre in Toronto.
On January 21, 2014, Boston announced that they had re-signed Miller to a two-year, one-way contract extension. Miller is the first Bruin to wear the number 86.
