Their second best pitcher (by WAR) has an xFIP over 6. At this point, it might be a surprise if their pitching staff (-0.6 WAR) manages to be replacement level.
For reference, the worst pitching staff of the modern era is the 2006 Royals at 0.5 WAR. That team included Rays pitching coach Kyle Snyder and superstar names like Jimmy Gobble, Brandon Duckworth, and Elmer Dessens. They pitched to old friend John Buck most of the time.
The worst in baseball history is the 1915 Philadelphia Athletics at 0.3 WAR. It will be a fun race to watch.