In the modern post World War II era, some of the worst international
goaltending performances from the "A" pool grouping include:
As noted earlier, Canada defeated Denmark 47-0 in the 1949 world
championships at Stockholm. It was Denmark's international hockey
debut and Danish goalie Flemming Jensen surrendered 13 goals in the
1st period, 16 in the 2nd and 18 in the 3rd period. The Canadian
team, represented by the Sudbury Wolves, scored a goal on an average
of every 77 seconds.
Two days later, Austria beat Denmark 25-1, with Jensen giving up
all 25 goals. As a result of these defeats, Denmark did not return
to play international hockey again until 1962.
At the 1950 world championships in London, Canada defeated Belgium 33-0
with Belgian goalie Charel Heylen in net for all 33 goals against, and
he faced a total of 114 shots in the game. His playing was actually
spectacular and the final score would have been much worse if not for
his stellar performance.
At the 1948 Olympic Games in St. Moritz, the U.S. beat Italy 31-1,
scoring 31 times on Italian goalie Gianantonio Zopegni.
If you want to look at some normal run of the mill regular season NHL games then there are lots. Patrick Roy in 1995 as his last game as a Hab. Dave Reece the poor goalie behind Sittler's 10 point night, etc.
But if you want to pick some important games/series then there are some notable ones:
Nabokov Quarterfinals 2010 Olympics - Honestly, the better team won, but there are times when a goalie just literally puts his team out of the game before it even starts and this pretty much happened with him and it hurts that he has never been known to be a shut down goalie in the playoffs with San Jose to start with. A 7-3 final, and to be honest Canada took their foot off the pedal after 6-1.
Mike Liut 1981 Canada Cup - I know, the whole team played lousy. But they lost 8-1! Liut wasn't totally at fault but failed to make the big save when the team needed it too. It was a two-way street.
Cheevers Game 3 1979 Challenge Cup - Team NHL lost 6-0 to the Russians and this was a case where Cheevers allowed some bad goals, unlike Liut.
Fleury 2012 playoffs - The worst I have seen in recent memory. Did Claude Giroux score on him everytime he shot from any angle at any time of the game? It seemed like it.
Luongo 2009, 2010 vs. Chicago - He blew the joint out. I was convinced he just simply was cursed with the colour red. You could blame him for those losses and it might be an understatement.
Vernon 1990 playoffs - Was shaky the whole time and is a big reason that Flames team only won once (although he was a big part of when they won). He was in net for part of that 12-4 rout.
Mark Visentin 2011 WJC Gold Medal game - There are countless things wrong with this scenario. I hope coach Dave Cameron never comes within a 100 mile radius of a Canadian team bench again and how he cut Nugent Hopkins is a mystery as well as why he left Visentin in net and didn't call a time out. But when you enter the third period of a gold medal game up 3-0 and lose 5-3 thanks to some weak goaltending, well, let's just say this still irks me.