FC Haka
After a successful period with Hämeenlinna, Pesonen was snapped up by FC Haka for the 2009 season to cover as backup for Janne Korhonen. In January 2010 Pesonen signed a two-year contract extension with FC Haka, and he was promoted to first choice in the middle of the 2010 season after Korhonen's departure to JJK.