I disagree on this one. In 2023 Montgomery has a 3.49 ERA, 1.29 WHIP, and 3.49 FIP. He was healthy with the Yanks in 2021 and half of 22, and in that time he had a 3.77 ERA, 1.20 WHIP, and 3.78 FIP. Also YS is more hitter friendly than Busch Stadium, so the difference between the two performances is pretty negligible.