Jon Rahm had been at the forefront of criticism for his subpar play at the majors ever since he joined LIV Golf, but he was right back in the thick of things on Sunday at the PGA Championship.Rahm even tied the lead with eventual champion Scottie Scheffler after a clutch birdie on the 11th hole, but things only went downhill from there for the two-time major champion.Rahm eventually finished in a tie for eighth after a disastrous finish that left him seven shots behind Scheffler, and his downfall late on Sunday afternoon cost him more than just a chance at the Wanamaker Trophy.Had Rahm won, he would have taken $3.42 million that was eventually awarded to Scheffler. Instead, after finishing in a tie for eighth with nine other golfers at 4-under par, Rahm will only take home $454,781.In total, his late collapse cost him nearly $3 million.Rahm's putter went cold after sinking that clutch putt on 11 as Scheffler reclaimed the lead. With Rahm playing catch-up, he lipped out a birdie put on No. 13 before failing to gain any ground on the scoreable 14th and 15th holes.Then, Quail Hollow's Green Mile gobbled up any hopes that Rahm had of lifting the Wanamaker. An errant tee shot on 16 led to a sloppy bogey before the Spaniard's shot on the par-3 17th bounced through the green and went into the water.Rahm would make a double bogey there before splashing his tee shot on 18 into the creek, leading to another double to finish the championship. His 5-over finish in the last three holes cost him millions and will leave him even hungrier coming into the U.S. Open.Of course, Rahm isn't hurting for cash over on the LIV Tour, but he still would have liked a better finish at the season's second major. Instead, his early charge on Sunday is merely a footnote in another tale of Scheffler's triumph.More Golf: Scottie Scheffler Immediate 'F-Bomb' Reaction to Winning PGA Championship