• 9.4 baseline — 0.6 × season 9.4 (10 gm) + 0.4 × last 10 9.4
• −0.2 opponent leak — they concede 209.2/game vs a 213.6 league average
• −0.2 at this ground — averages 9.2 there (12 gm)
• wet forecast: too thin to count (3 gm) — shown, adds nothing
• vs them: averages 10.0 over 8 games — evidence, never summed

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 16: 1 — far outside his usual range; kept in the average, not smoothed away.