Jason Day fired a third consecutive four-under-par 67 in the Deutsche Bank Championship and he’s still seven shots off the lead – that’s how well Sergio Garcia is going.

Attempting to stay in the US PGA Tour play-off series’ ever-diminishing fields, Garcia added a 65 to his earlier 65 and 64 to be 19-under 204 going into the final round of the second event.

That gave the Spaniard a two-shot lead over Sweden’s Henrik Stenson (66) in the $US8 million ($A9 million) tournament at rain-hit TPC Boston.

Canadian Graham DeLaet (62) and US veteran Steve Stricker (63) got hot on Saturday to be one stroke further back in a tie for third.

Day was tied ninth in a group including countryman Marc Leishman (64) while fellow Australian Adam Scott was tied 41st after a 67.

DeLaet fired 10 birdies in his round and said he benefitted from players being allowed to lift, clean and place the ball in the fairway, the rule invoked on the sodden course after a lengthy rain delay.

In order to get the round completed, and stay on track for a Monday finish on the US Labor Day holiday, officials scrapped the partial scores of players who teed off before the delay, then redrew the groups and sent players off from the first and 10th tees.

World No.1 Tiger Woods couldn’t take advantage of the rain-softened course, firing a one-over 72 to be tied 47th.

Woods looked grim as he walked off the 18th green, having hit just seven of 14 fairways and 12 greens in regulation.

“The course is gettable, that’s for sure,” Woods said. “You could be very aggressive and not have to worry about anything. Just one of those days I had a bad day at the wrong time.”

Woods came into the second of four events in the US PGA Tour playoffs leading the playoff standings.

Only the top 70 in the standings will be eligible for the BMW Championship in a fortnight, with the top 30 after that advancing to the Tour Championship where a $10 million playoff bonus will be on offer.