If you "required" the link, then it would have been appropriate to provide context to what was relevant in said link so that the previously accepted answer would have been more robust and standalone (the list was from TSN, but why wouldn't a list from the NHL or another "sports network with high reputation" suffice otherwise?). See how to answer for more information.
Because the source was of utmost importance for you to confirm the answer's findings, I see where you are coming from. However...
I have no way of confirming if the list provided is correct.
For such information, I cannot imagine it would be very hard to use a different source (out of several...NHL, Hockey Reference, etc.) to confirm the data. It may have included repetitive lookups, but not impossible to confirm (eg, 1998 Stanley Cup Playoffs from Hockey Reference showing the results of each series that year). Thus, you do have a way (out of potentially several ways) of confirming if the list provided is correct.
Below is how I would have handled such a case. "Users are charged with the task of editing to improve ... formatting and content." I have replaced the dead link with a cached snapshot from web.archive.org. If links die, you can use said resource to "resurrect" a link, but again, we prefer our answers to provide context for links. Considering the user stated, "I could post the same list as above or you can check out the list from TSN," this user could have as easily incorporated this information into the other answer that actually provided a list of occurrences to improve that answer dramatically.
There have been 20 [Stanley Cup finals sweeps].
I could post the same list as above or you can check out the list from TSN
Year Winning Team Losing Team
1998 Detroit Red Wings Washington Capitals
1997 Detroit Red Wings Philadelphia Flyers
1996 Colorado Avalanche Florida Panthers
1995 New Jersey Devils Detroit Red Wings
1992 Pittsburgh Penguins Chicago Blackhawks
1988 Edmonton Oilers Boston Bruins
1983 New York Islanders Edmonton Oilers
1982 New York Islanders Vancouver Canucks
1977 Montreal Canadiens Boston Bruins
1976 Montreal Canadiens Philadelphia Flyers
1970 Boston Bruins St. Louis Blues
1969 Montreal Canadiens St. Louis Blues
1968 Montreal Canadiens St. Louis Blues
1960 Montreal Canadiens Toronto Maple Leafs
1952 Detroit Red Wings Montreal Canadiens
1949 Toronto Maple Leafs Detroit Red Wings
1948 Toronto Maple Leafs Detroit Red Wings
1944 Montreal Canadiens Chicago Black Hawks
1943 Detroit Red Wings Boston Bruins
1941 Boston Bruins Detroit Red Wings