Rather, what happened is that they figured out what his surprising strengths were and have tried to avoid those.
I looked at the TexasLeaguer plots for 5/1 to 5/8 versus 5/9 to 5/18 and broke down pitch location in a 5 x 5 grid (dividing the zone into thirds). The big difference is a big reduction in pitches on the outer third of the plate, middle-high and low, from 21% of all pitches to 10%, and a big increase in pitches in the middle of the zone, at all heights, from 9% to 27%. (Presumably most of the latter are offspeed pitches rather than fastballs.) Another difference is a reduction in pitches mid-high, and inner 3rd or inside from 13% to 7%.
He's also just not hitting as well. In his hot streak he only swung at 2 outside or low and outside pitches, out of 12 and 6 respectively, while cold he's chased 21% outside and 35% low and outside.
Here are pitch locations, catchers POV, with lumping of pitches outside the zone in only one axis.
WMB Hot
| 0% | 10% | 2% | ||
| 1% | 2% | 2% | ||
| 7% | 10% | 1% | 11% | 13% |
| 4% | 6% | 10% | ||
| 0% | 12% | 7% |
WMB Cold
| 0% | 5% | 1% | ||
| 2% | 7% | 3% | ||
| 3% | 5% | 9% | 5% | 12% |
| 4% | 11% | 5% | ||
| 2% | 17% | 9% |
And here's a breakdown vertically and horizontally, five ways each.
WMB Locations
| Vertical | Hot | Cold |
| High | 12% | 6% |
| Top 3rd | 7% | 14% |
| Mid 3rd | 33% | 25% |
| Bot 3rd | 29% | 27% |
| Low | 19% | 28% |
| Horizontal | Hot | Cold |
| Inside | 7% | 5% |
| Inner 3rd | 18% | 16% |
| Mid | 21% | 39% |
| Outer 3rd | 31% | 18% |
| Outside | 22% | 22% |
