Despite rain just before the competition, the Swede made a total of seven birdies during the round, which gave him a -5 and a share of fifth place.
The Australian Min Woo Lee leads at -8, ahead of Norwegian Viktor Hovland, who shares second place at -6.
The PGA Tour finals competition brings together 30 players who qualified via season rankings and playoff rounds. Ludvig Åberg is the only remaining Swede.
The winner will take home the equivalent of approximately SEK 95 million.
