After trading texts and phone calls the last few months, Day and Swatton got down to the high-tech work in a lab working his swing and putting and the results have been immediate.

Jason Day (64) posts his career-low score in 41 rounds at the Arnold Palmer Invitational presented by Mastercard. He is the first player to shoot 64 or better at Bay Hill since 2021 (Keegan Bradley/64/R3).

Clark finished the second round shooting one under par, and he found himself mired in controversy when he gave himself relief on the third hole when his ball landed in a pitch mark on the fairway. Fans questioned whether this was allowed, as Clark would not be allowed free relief if his ball landed in another player's pitch mark.

No, Wyndham Clark is not married ... amid Women's World Championship after revealing how she turns 'miserable all day' "I threw up" - Charley Hull details eventful morning amid Women's World ...

Shane Lowry two ahead of Wyndham Clark, with Collin Morikawa in tied-third alongside Corey Conners; Former Bay Hill champion Rory McIlroy four behind and world No 1 Scottie Scheffler seven back; Watch

Topping the leaderboard after the second round was a relaxed Shane Lowry, who fired a five-under-par 67 to open up a two-shot lead at the halfway stage. The 37-year-old Irishman reeled off six birdies and one bogey to head into the weekend at the Bay Hill Club & Lodge on eight under through 36 holes.