Tärnström was your typical skilled, offensive-minded defenseman. He had a hard, accurate point shot and a very strong passing game. An asset with the man advantage.
On the downside, he was inconsistent in his defensive coverage. Also wasn't a physical player despite decent size.
- 2013-01-18 • Announced his retirement due to a back injury
- 2012-05-02 • Re-signed to a one-year contract by AIK
- 2010-05-17 • Re-signed to a two-year contract by AIK
- 2008-04-23 • Signed by AIK
- 2008-02-01 • Traded to the Columbus Blue Jackets for Curtis Glencross
- 2007-07-01 • Signed to a one-year contract by the Edmonton Oilers
- 2006-08-16 • Signed to a one-year contract by Lugano
- 2006-01-26 • Traded to the Edmonton Oilers for Jani Rita & Cory Cross
- 2005-08-29 • Re-signed to a one-year contract by the Pittsburgh Penguins
- 2004-08-09 • Signed to a lockout contract by Södertälje
- 2003-07-30 • Re-signed to a two-year contract by the Pittsburgh Penguins
- 2002-08-06 • Claimed off waivers by the Pittsburgh Penguins