The league's department of player safety announced Westgarth's suspension Tuesday.
Westgarth was suspended for his hit on Ottawa defenseman Mark Boroweicki at 7:55 of the first period of Sunday's game.
Boroweicki was injured and did not return. Westgarth received a 2-minute boarding penalty.
The league says Westgarth will forfeit $7,435.90 and the money will go to the players' emergency assistance fund.