EX-PGA champ Day leads Wells by 1 shot

Three years and 364 days since his last win, Jason Day describes himself as “obsessed” with honing his new swing and improving his results, even if he never gets back to No. 1 in the world.

There wasn’t much need for improvement Thursday as Day shot a 7-under 63 to take the first-round lead at the Wells Fargo Championship.

Joel Dahmen was a shot back on what could be the best day for scoring at TPC Potomac at Avenel Farm outside of Washington, with rain, wind and unseasonably cool temperatures in the forecast through Sunday.

The 34-year-old Day has been working with instructor Chris Como on a swing that will help protect his chronically balky back.

Day’s renewed dedication and relative good health are encouraging signs from a player who won eight times in a 15-month span in 2015-16, including the PGA Championship and the Players Championship.

College football: Former Florida starting QB Emory Jones committed to transfer to Arizona State.

NBA: The Clippers and F Robert Covington, 31, agreed to a two-year, $24 million contract extension, ESPN reported.

NFL: The Chargers signed veteran LB Kyle Van Noy. Terms weren’t announced. Van Noy, 31, was released by the Patriots in March.

NHL: G Antti Raanta’s status for Game 3 of the Hurricanes’ first-round series against the Bruins on Friday was unclear a day after he exited a Game 2 victory following a collision with Bruins F David Pastrnak. Raanta did participate in an independent off-day skating session.

Tennis: Rafael Nadal saved four match points before outlasting David Goffin 6-3, 5-7, 7-6 (9) to reach the quarterfinals at the Madrid Open. Earlier, Andy Murray withdrew from his scheduled match against Novak Djokovic because of a stomach illness.