• 12.2 baseline — his last 10 games; only 2 this season, too few to blend
• −0.3 opponent leak — they concede 360.2/game vs a 369 league average
• +0.1 at this ground — averages 12.3 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 11: 3 — far outside his usual range; kept in the average, not smoothed away.