Does anyone track mlb bullpen fatigue here?

I lean old school and log game logs into a spreadsheet, since velocity drops across a series often flag fatigue better than pure pitch counts. Have you noticed certain catchers amplifying or masking tired arms?

i’m not buying that a single site nails bullpen fatigue accurately, even the paid ones overfit to box score recaps and miss the poker-like risk angles (like sudden call-ups or soft-tossers eating innings). do you ever just track actual pitch counts and note leveraged spots yourself?