• 4.9 baseline — 0.6 × season 4.5 (14 gm) + 0.4 × last 10 5.4
• +0.1 opponent leak — they concede 190.9/game vs a 185.9 league average
• at this ground: too thin to count (1 gm) — shown, adds nothing
• vs them: averages 7.2 over 6 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: 14 — far outside his usual range; kept in the average, not smoothed away.