The Rays have the third best rotation in the MLB by WAR, best on a per-inning basis - lead the MLB in K/9, ERA, FIP and xFIP. They are not the same at all. Not to mention the Rays are absolutely pummeling the competition offensively, the gap between them and the next closest position player group is as big as second place and 24th place, which is absurd.
Nobody is keeping them "in games", their rotation has an ERA over 5 which is 9th worst in the league if you want to go by "results". Kyle Gibson and Tyler Wells f***ing suck. Their only starter with any sort of upside is Grayson Rodriguez, Kyle Bradish has pitcherish traits but mostly has sucked and doesn't project that well at all. Eventually if your rotation blows the bullpen will start to feel it as well, as we very well know with the Blue Jays this season.