The Texas Rangers had five playoff seasons in the seven years from 2010-16 and were in two World Series, losing both of them. They are one of seven franchises who has never won a World Series (Brewers, Mariners, Rockies, Padres, Rays, Expos/Nationals are the others).
Since they won 95 games in 2016, they’ve gone rapidly downhill, to 84 losses in 2017 and 95 in 2018. Remember when Las Vegas product Joey Gallo was supposed to be almost as good as Las Vegas product Kris Bryant?