Lehtonen, 26, has not played in any games this season because of an injury. The second overall pick in the 2002 NHL draft, Lehtonen has appeared in 204 NHL games with the Thrashers, spanning five seasons (2003-09) and has recorded a 2.87 goals-against average, .912 save percentage and 94-83-17 record in those outings.
Lehtonen began his North American career with the Wolves and posted a 60-31-4 mark in 98 career games with Chicago from 2003-05, and a two-game conditioning stint in 2007. His 60 wins and eight shutouts with Chicago rank second in franchise history behind Wolves general manager Wendell Young's 169 victories and 16 shutouts.
He is the Thrashers all-time leader among goaltenders in games played (204), wins (94), shutouts (14), and save percentage (.912).