Tyler Arnason was born March 16, 1979 in Oklahoma City, OK. The 7th choice, 183rd overall selection of the Chicago Blackhawks in the 1998 NHL Entry Draft, Arnason is a graduate of Fargo-Moorhead of the United States Hockey League where he was the league's leading scorer in 1997-98 prior to becoming a member of the St. Cloud State Huskies in 1998-99.
Named to the WCHA All-Rookie Team in 1998-99, the Oklahoma City native led the Huskies in scoring during his sophomore season and finished eighth in WCHA scoring, earning All-WCHA Second Team honours in 1999-2000.
Arnason returned to St. Cloud State in 2000-01 where he led his team in scoring for the second consecutive season before joining the Blackhawks AHL affiliate in Norfolk for the 2001-02 season. In 60 games with the Admirals, Arnason finished with 56 points leading the team in scoring and leading them to first place in the South Division while earning AHL Rookie of the Year honours.
Although he spent the majority of the season in Norfolk with the Admirals, Arnason strong play earned him a call up to the parent club where he spent the latter half of the 2001-02 season.
On March 9, 2006, he was traded to the Ottawa Senators in exchange for Brandon Bochenski and a second-round pick and would appear in just 19 games for the club.
On July 1, 2006, Arnason signed a one-year deal with the Colorado Avalanche, wher his father had also played in the NHL. for the Colorado Rockies. Arnason posted an impressive 49 points for the Avalanche in the 200607 season.
On July 3, 2009, Arnason signed a one-year contract with the New York Rangers, but was assigned to the club's AHL affiliate in Hartford Wolf Pack.
On November 10, 2009, Arnason signed with team Dinamo Riga of the KHL.