Only 36 hours, but boy how things have changed.
While we're a bit too early to really be focusing on the standings, Vegas has dropped from first place to third in the Pacific Division, behind the Calgary Flames (eight points) and Los Angeles Kings (seven points).
The team's lineup will be changing quite a bit, too, based on three injuries to hit the Vegas' roster.
All of this will be part of the storyline as the Golden Knights look to get back in the win column this afternoon against the Boston Bruins.
Today's game starts at 4:00. It can be seen on AT&T SportsNet. This is Cox channels 313 (SD) and 1313 (HD), DIRECTV channel 684, U-verse channels 757 (SD) and 1757 (HD), and CenturyLink channels 760 (SD) and 1760 (HD).
Here are three keys to today's game.
Video: Checking in from City National Arena
1. No Fleury
Goalie Marc-Andre Fleury has been the face of the Vegas franchise since being selected during June 21's Expansion Draft. He was placed on the injured reserve list with a concussion on Sunday morning, after being kneed in the head during Friday's game against the Detroit Red Wings.
While Maxime Lagace has been recalled from the Chicago Wolves to take his place on the roster, it's expected that Malcolm Subban gets the majority of starts in Fleury's absence. Fleury is expected to miss about a week.
For Subban, the plot couldn't be more interesting, either. On Sunday, he's expected to start against the Boston Bruins, the team he was claimed off waivers from earlier this month.
Subban was originally a Bruins first-round draft pick in 2012, but spent most of his professional career with their minor league club in Providence, Rhode Island. He got into two NHL games with the Bruins, but never won.
Should Subban get the nod on Sunday, it would be his first appearance for his new team, and against his former team. And if he could get a win, it would come against the team that drafted him that he was a part of until only weeks ago, despite never having won a game for them.
Should be fascinating to watch.
One of the more surprising storylines coming out of training camp was highly-billed Russian free agent Vadim Shipachyov being sent to the minor leagues.
George McPhee has insisted that this was more of a numbers move than performance related, with Shipachyov's arrival be set for as soon as Vegas' crowded roster got some roster flexibility.
That flexibility has arrived, with forwards Erik Haula and Jonathan Marchessault being placed on the injured reserve list. Both players scored goals on Friday against the Detroit Red Wings.
Shipachyov, a playmaking center, will debut vs. Boston.
Alex Tuch is also expected to debut. Tuch is a 21-year-old former first-round pick of the Minnesota Wild who dominated during training camp, who was also forced to the AHL because of sheer numbers.
Tuch and Shipachyov's returns, coupled with Haula and Marchessault's absences, will throw a new wrinkle into Vegas' lineup.
3. Not your older brother's Bruins
For most of this decade, Boston was one of the NHL's most dominant teams. A Stanley Cup in 2011 was followed by an appearance in the Final in 2012-13, and a Presidents' Trophy in 2013-14.
Since then, the Bruins haven't exactly been bad, but haven't been the powerhouse they once were, either. Boston has missed the playoffs two of the past three years, and is only 2-2-0 to start this season.
The Bruins have been giving up goals at an alarming rate this season, too-star goalie Tuukka Rask has a 3.76 goals-against average and .870 save percentage, which are both near the bottom of the league.
Boston is, however, coming off its best game last night, defeating the Arizona Coyotes 6-2.
Brad Marchand, David Pastrnak and Jake DeBrusk all had a goal and an assist last night, and are probably Boston's three most dangerous offensive players.
Marchand and Pastrnak were expected to be the Bruins leaders. DeBrusk is a 20-year-old rookie.