The NHL announced the suspension Wednesday.
Selleck came off the bench to fight Carolina forward Kevin Westgarth with 2:58 left in the Panthers' 4-1 win Tuesday night.
That triggered an automatic one-game suspension for instigating a fight in the last five minutes. The second game was added for leaving the bench during a legal line change.
Westgarth, who was not engaged with any other player, dropped Selleck with two punches.