Hamilton’s first Ferrari win in Barcelona closed the gap to 41 points behind Mercedes’ championship leader Kimi Antonelli.
Rory McIlroy was in a larger group on one under but would have been higher had he not bogeyed his final two holes.
Pollock played an influential role in Northampton reaching Saturday’s Gallagher Prem final against Exeter.
New Zealand closed day three in a commanding position, boasting a 352-run lead with seven wickets in hand and two days to push for victory.
But post-race drama made connections wait to be confirmed the winner.