Slab
Occasional Tour Caddy
Based on McIlroy's last 20 PGA Tour rounds, his handicap Index would be +8.7 (Or -8.7 for those that don't like the Plus Handicapper Terminology ). Two caveats:
1. Not taking PCC into account
2. I've not rounded any bad scores down to nett double bogey, if he had any (bearing in mind several holes a double would need to be rounded down to a bogey for him)
His best Score Diff was -10.4 at East Lake, and his worst of the 20 -0.9
Taking another step... I wonder if any of his rounds would be unacceptable for h/cap due to how the Tours often mess with hole length from day to day & even par