It’s less the case in baseball than other major sports that a single player can make or break a team. But a single bad starting pitcher can probably do more than anyone else to sink their franchise. Over the entire history of the American and National Leagues, only nine teams have won a pennant with a starter (min. 18 starts) posting an ERA of 5.60 or above. The 2023 Diamondbacks had not one, but TWO such players, in Zach Davies (ERA 7.00) and Brandon Pfaadt (5.72). The only other league champions to match that are the 1987 Twins, with Joe Niekro (6.