Alejandro Tosti was left holding the bag.

The Argentinian golfer’s caddie quit halfway through the opening round of the PGA Tour’s Biltmore Championship Asheville on Thursday in a bizarre scene.

Cliff Ellis, on the bag for the 30-year-old at the 18th hole — Tosti’s ninth of the day — “dropped the bag, took off his caddie bib and walked off,” according to a Golfweek source.

The pair had reportedly been out of sorts since a practice round on Tuesday, but Tosti, who has a history of behavioral issues on the course, was shocked when Ellis did not return from what he believe was a bathroom break.

“He couldn’t keep up with eight pars in a row,” he told Golfweek via text, adding multiple laughing emoji.

Tosti finished the round with a +1 72, tying him for 99th.

The fiery golfer has had several run-ins with his own caddies, including an expletive-laced incident with Ray Yoel in 2023 that ended with a suspension for conduct unbecoming a professional from the Korn Ferry Tour. Earlier this year, he went viral for making his caddie wear a customized bib that read “NEED A WIFE” at the Valspar Championship — a reference to his own love life.

It’s not just caddies that have friction with Tosti, with one Korn Ferry player describing him as a “Dr. Jekyll, Mr. Hyde type.”

“I’m only a jerk Thursday through Sunday,” he allegedly told a Tour veteran who asked him why he’s like this. “That’s my chance to make money and I don’t like anyone getting in the way of me getting my money.”

He’s long been well aware that his demeanor is a facet of his game that needs work.

“It’s been the challenge for me my whole life, dealing with myself,” he told Golfweek in 2024.

Tosti tees off again at 1:49 p.m. Friday — it remains to be seen if who will be lugging his clubs around the  The Cliff at Walnut Grove for Round 2.