Mazara is hurt, and I think if Madrigal stays down for a week they get an extra year of service time from him. I don't like it but that's probably what's happening. No other explanation for it, since they are in win now mode and he's the best 2B in the org.
Ideally you'd put Madrigal at 2b and Leury cover for Mazara until he's ready, with Delmonico as the backup.
My guess is Delmonico is also starting to balance out the lineup a bit with handedness.