Over a period of time...not just looking at immediate results...Wittgren and Parker are basically equal in effectiveness.
Since 2018...
Wittgren ...171.1 IP...3.57 ERA...4.24 FIP...0.6 fWAR.
Parker....181.1 IP...3.52 ERA...4.50 FIP...0.5 fWAR.
Wittgren is 30. Parker is 36.
Since 2018...
Wittgren ...171.1 IP...3.57 ERA...4.24 FIP...0.6 fWAR.
Parker....181.1 IP...3.52 ERA...4.50 FIP...0.5 fWAR.
Wittgren is 30. Parker is 36.