Wren began his hockey career with the Guelph GMC 's and the Kingston Voyageurs in the Canadian Junior Football League Ontario Junior Hockey League and moved in 1991 into the professional junior league Ontario Hockey League, where he 134 goals and 211 assists for the Detroit Junior Red Wings reached in three years and was elected twice to the OHL All- Star team. NHL Entry Draft 1993, the Center was selected in the third round at 94th overall position of the Los Angeles Kings. However, Wren signed a contract as a free agent with the Hartford Whalers, but played for their farm team, the Springfield Falcons in the American Hockey League. Further stations were the Mighty Ducks of Anaheim, where he his first games in the National Hockey League played in the 1997/98 season, as well as their farm team, the Cincinnati Mighty Ducks. Especially in the American Hockey League the achievements of Canadian were above average and he was behind the other in three seasons leading scorer, but never made the leap into a permanent NHL squad.
About the Toronto Maple Leafs, where Wren his only NHL Play -off Match, as well as the AHL stations St. John's Maple Leafs, Milwaukee Admirals and Binghamton Senators came Wren for the season 2003/ 04 to Europe to the Augsburg Panthers in the German Hockey League. Here the links Sagittarius belonged with 19 goals and 34 assists to the best scorers in the league. After one year, the Canadians moved to Austria to Vienna Capitals first division, where he with 66 goals and 150 assists, also belonged in the next three years the most successful collectors points in the league.
After negotiations with manager Karsten Mende and coach Geoff Ward, who already knew Wren many years of preparations for the respective seasons in Europe at his hockey school, the attacker moved to season 2007/ 08 at the Iserlohn Roosters and signed a two-year contract. In his first season Wren denied due to a ligament strain and a medial ligament crack initiation 40 games in the main round, but still one of the greatest offensive players of his team. The next year he stayed injury free and was on the side of Jimmy Roy and Ryan Ready again one of the best scorer of the team.
For the season 2009/10 Wren was taken from ERC Ingolstadt under contract. Early April 2011, decided this would not renew his end of the season 2010/11 expiring contract. In August 2011, he was obliged by the Ravensburg Tower Stars of the 2nd Bundesliga. After only one year at the Ravensburg Tower Stars he signed for first division EC Graz 99ers.
In July 2013 Wren was obliged for a season of the Nottingham Panthers of the Elite Ice Hockey League.
Awards and achievements
( Key to Career statistics: Sp or GP = Games Played, T or G = goals scored, V or A = achieved assists; Pts or Pts = scored points scorer, SM or PIM = received penalty minutes, / - = Plus / Minus balance sheet; PP = scored majority gates; SH = scored shorthanded goals, GW = achieved victory gates; Play-downs/Relegation 1 )