Hot and Cold, August 7

Form by the rates: 16 heating up, 16 cooling off across hitters and pitchers.

Form, measured as a rate rather than a total. Comparing the week of July 27 to August 2, 2026 against the whole of July 1 to July 31, 2026, per plate appearance for hitters and per inning for pitchers, because a player who simply started more games last week has not changed, he has just played.

Hitters

Heating up. The top tenth of the group by change in points per plate appearance, a bar of +0.36 set by this run's own spread rather than by a fixed number.

Cooling off. The bottom tenth, at -0.45 or worse.

Pitchers

Heating up. The top tenth of the group by change in points per inning, a bar of +1.55 set by this run's own spread rather than by a fixed number.

Cooling off. The bottom tenth, at -1.65 or worse.

What this means

Start with Cristopher Sanchez, because he is the one number in this table that can't be explained by the usual small-sample noise excuse. A jump from 0.78 points per inning over the month to 4.00 last week is enormous, but the forward rank is #25, meaning the engine already thought he was an ace before the hot week and still does. That is the tell. When a pitcher ranked inside the top 25 posts a bad month, the bad month is the outlier, not the week. The month-long 0.78 was almost certainly one blowup start dragging a per-inning rate around, and the way to check is boring but decisive: if his next two outings sit anywhere near 2.0 per inning, the month was the lie. If he keeps handing you three-inning starts, the rank is the thing that's wrong. I start him without thinking about it, and the cost of being wrong is one bad line in a week you were going to use him anyway.

The Phillies rotation gives you the mirror image. Luzardo fell from 3.03 to 0.38 per inning, the second largest drop among pitchers here, and Wheeler slid from 2.89 to 1.20. Both still rank in the top 60, Wheeler at #12. Nobody is benching Wheeler over a 1.20 week. The interesting question is whether Luzardo's #54 survives contact. A drop of 2.66 per inning is not a rounding error, and per-inning scoring punishes short starts twice: fewer innings to absorb the damage, and the damage itself. If the driver is a shortened outing rather than a genuine loss of stuff, it repairs itself immediately. I hold, and I'd try to buy him from the manager who is reading the last week as a trend.

Foster Griffin is where I would push back on the engine. He is ranked #65 while posting -1.31 points per inning last week, the worst rate on the board, against 1.81 for the month. A negative per-inning figure means he gave back more than he produced, and that only happens with a genuinely ugly outing. Nothing in this data tells me whether it was a role change, a spot start, or one bad afternoon, so I'm not going to invent a mechanism. What I will say is that a #65 forward rank is a strong claim, and it is the kind of claim that gets tested fast. Two more starts in that range and the rank has to move. One clean start and this line disappears from the table entirely.

The batter columns are mostly noise, and I would say so plainly. Rhys Hoskins going from 0.37 to 1.67 points per plate appearance is the biggest swing on the page, but the engine has him at #653, which is a polite way of saying it does not expect the week to repeat. Same story for his teammate Manzardo at #609. These are weekly rates on small handfuls of plate appearances, and the forward ranks are the engine telling you it has seen this movie.

One exception is worth the roster spot. Adrian Del Castillo dropped 0.75 and is still ranked #324, the best forward rank of any cooling bat here. That gap, cold week against a rank the engine has not cut, is exactly the shape of a buy. Palacios at #366 and Joey Ortiz at #363 sit in the same band. Add Del Castillo if he is free, hold if he is yours, and drop him only if the playing time goes, not because of one week of negative scoring.

How to read this

Everything here is a rate. Points per plate appearance and points per inning remove the schedule from the comparison, which matters more than it sounds: the single most common reason a player "broke out" last week is that he started six games instead of three.

The two windows overlap, the week sits inside the month, so every player is partly being compared against himself. That pulls each number toward zero, which means real form changes are understated here and none of them are manufactured by the method.

The cutoffs are the tenth and ninetieth percentiles of the group being shown, recomputed every time this runs. A pitcher and a hitter are never held to the same bar, because their spreads are not the same shape.

A player needs 5 plate appearances or innings in the week and 20 in the month to appear. A rate built on two at-bats is not form, it is arithmetic.

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