317-400 Saints all time record
431-365 Vikings all time record
Philadelphia Phillies .471 prior to last season (even worse now) 1st team with over 10,000 losses
Houston Astros .488
Minnesota Twins (.496 as Twins)
Chicago Cubs .511 with 10k+ wins and 10 k losses
I stick with my choices as the bums of their sports.
I have been a fanatic sports fan all my life (I'm 52, so since the early 70's) and I have watched my teams lose a crap ton of games! I am not switching teams though, it's not been all bad.
Congrats on your teams who have mostly floundered as well, and your long fandom.