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.
Henry Nicholls reached 119 not out after he and Rachin Ravindra were both reprieved in a stand of 161.
But post-race drama made connections wait to be confirmed the winner.