While it's not official yet, it looks like the Bruins have settled on their call-up:
The Boston Bruins have called up 21-year-old defenceman Jeremy Lauzon from the AHL. He'll likely be in the lineup Thursday vs Flyers, Saturday vs Canadiens pic.twitter.com/VV25TVZZeE— Domenic Fazioli (@DomenicFazioli) October 25, 2018
Fazioli is a reporter based in Montreal, and Lauzon is from Quebec, so it's possible that this is a "knows a guy who knows" situation.
Plus, it'd be a pointless story to make up, so...yeah.
Lauzon shoots left, so he'll probably slide in wherever Urho Vaakanainen would have played.
The 21-year-old was drafted in the second round in 2015.
EDIT (11 AM): The Bruins have made it official. Lauzon joined the team this morning.