Lapierre was assessed a major penalty for checking from behind and a game misconduct in the first period of the Blues' 6-2 home loss. He served the first game of the suspension while awaiting an in-person hearing Friday.
The suspension will cost Lapierre $28,205.
Boyle was knocked out on the play, taken off the ice on a stretcher and spent the night in a hospital. He missed the Sharks' 4-3 shootout loss in Dallas on Thursday night.
I was going nuts and I saw [Subban], he was going crazy, and the ref had no idea where to go. [Subban] was skating to me, and I was skating to him and the ref was right in between us and I don't know, I kind of hit him pretty hard, I thought, but those were some emotions and I'm pretty sure he understands that.
— Montreal forward Alex Galchenyuk on the celebration following his OT goal against Ottawa in Game 2