Overall, the Royals bullpen has been the weakest part of the fast start. There has been a lot of hand-wringing about the deficiencies in the offense, but really it has been good enough so far. An average of 4.67 runs per game when the league average is 4.33 is not amazing, but it is 8th in baseball currently. Turns out, having two MVP-level bats in an offense is really helpful. The bullpen however ranks 25th by fWAR, 25th by FIP, and 29th by xFIP. Luckily, they rank 17th by ERA, and so have avoided some of the downside that seems plausible to this point.