By Joshua Lees Phil Mickelson’s off-season phone calls appeared to have done the trick for LIV Golf, after the Saudi-backed series signed a group of stars for the new season. The 2024 LIV campaign got underway in Mexico on Friday, and the Mayakoba setup played host to a number of debuts. The biggest being Masters champion Jon Rahm, who became LIV’s record-breaking signing last December, penning a deal worth a reported £450million. The signing of the Spanish star then saw his Ryder Cup partner and world No. 16 Tyrrell Hatton also come through the door, as the pair joined forces as part of the n…