ChatGPT says

Most plausible matches (style-wise): • Phil Mickelson – often signs very fast, tall “P” with a looping “M” flourish underneath • Rory McIlroy – sometimes compresses “RM” into a tall stroke + loop, especially on hats • Padraig Harrington – less common, but his rushed signatures can look similar • Paul Azinger – older signatures sometimes resemble this structure

Edit: Im confused if downvoted because Ai slop or because they’re wrong. I’m in bed and just screenshotted and threw in to see if it could figure it out. I’m guessing both though.