2005-06: Led the defensemen in the Finnish Elite League in scoring with 34 points (eight goals, 26 assists) in 56 games. Played parts of six seasons with Ilves Tampere of the Finnish Elite League.
2006: Attended Predators prospects camp in Nashville.
2006-07: Signed and assigned to the AHL Milwaukee Admirals.
2007-08: The time he saw in the Nashville lineup was due in part to injuries.
Very smart and polished, Koistinen is a good skater. Plays on the power play.