In that case are we talking the combined 4-5 months it went great or the whole time? Castellanos was great for the whole time he was a Cub. Darvish was recovering in 2018, our 2nd best starter in 2019, and amazing in 2020. So except for Darvish recovering in 2018, I would say they were great the whole time. "the whole time he was a cub"