The all-time single season performance Mariners rotation

Oakland Athletics v Seattle Mariners
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Mariners 1995 Randy Johnson

Another pitcher who’s best season comes down to his Cy Young Award-winning and second-place Cy Young finishing season, this time being given to the former.

In the ‘95 season, Johnson led the AL in win percentage (.900), ERA (2.48), strikeouts (294), ERA+ (193), FIP (2.08), WHIP (1.045), H/9 (6.7), HR/9 (0.5) and SO/9 (12.3).

In every single conceivable way, it was one of the single-most dominant single-season performances by a pitcher ever, making it an easy choice for the all-time Mariners rotation.