Career
Allen played for Boston College, from which he was selected fifty-second in the 1998 National Hockey League Entry Draft by the Boston Bruins. He was subsequently traded to the Edmonton Oilers on the 2002 trade deadline, in exchange for Sean Brown. He spent the majority of his Oiler career in the American Hockey League, although he did play one game for Edmonton in 2002-2003.
On July 22, 2004 he signed as a free agent by the New Jersey Devils.
Allen never played with the Devils due to the National Hockey League Lockout. He was assigned to the Albany River Rats, of the AHL. On July 17, 2006, Allen was signed as a free agent by hometown team, the Boston Bruins, to a one-year deal.
Allen was assigned to start the 2006-2007 season with Boston"s AHL affiliate, the Providence Bruins. He spent the first half of the season with Providence before playing his first National Hockey League game in 5 years with the Bruins on January 17, 2007 against the Buffalo Sabres.
Allen"s physical play earnt him a spot with the Bruins for the remaining half of the season.
On July 6, 2007, after testing free agency Allen re-signed with the Bruins to a one-year contract for the 2007-2008 season. Allen only managed to play in only 19 games over the season with the Bruins as he was hampered by a back injury. Prior to the 2008-2009 season Allen was diagnosed with two herniated discs in his back and has been unable to play since.