Kahnberg is a pure offensive player. He likes to hang onto the puck for long stretches and shoot it himself. When he's on his game, he also uses his size to go the net and wreak havoc. Unfortunately, that isn't often anymore. Kahnberg has never been a speedster and is a below-average skater.
- 2013-02-25 • Signed to a two-year contract extension by Frölunda
- 2011-04-04 • Signed to a two-year contract by Frölunda
- 2009-03-31 • Signed to a two-year contract by Brynäs
- 2006-12-01 • Signed to a three-year contract by Frölunda
- 2006-04-25 • Signed to a one-year entry-level contract by the St. Louis Blues
- 2006-01-30 • NHL rights traded to the St. Louis Blues with M. Zigomanis, J. Boulerice, a 2006 1st round pick (traded to NJD; M. Corrente) & a 2007 4th round pick (C. Fairchild) for D. Weight & the rights to E. Rajamäki
- 2004-01-10 • Signed to a two-year contract extension by Frölunda