Seattle Mariners
There’s one big reason why the Mariners are an embarrassment to MLB. They haven’t made it to the postseason since 2001. That’s when they had a rookie named Ichiro Suzuki on their roster. Since then, it’s been a miserable two-decade tale of anguish for their fanbase.

They became historically bad around 2011 and showed few signs of improvement. Amazingly, their last foray into the playoffs saw them fall short in the American League against the Yankees. Hopefully one day they’ll turn it around but only time will tell (via Bleacher Report).