• 5.1 baseline — his last 10 games; only 2 this season, too few to blend
• −0.1 opponent leak — they concede 152.3/game vs a 155.4 league average
• +0.1 at this ground — averages 5.2 there (12 gm)

Derived, not measured — plain arithmetic over his real games, shown in full. Adjustments can overlap (a game at this ground can also be a wet one); they add simply, and this note is the admission. Round 20: 11 — far outside his usual range; kept in the average, not smoothed away.