That would be Andy Pazder, who on 8 August brought to an end an association with the PGA Tour that spanned more than three decades.
That was before he held another meeting with the membership to update them on what progress had been made over the framework agreement with LIV Golf's backers.
Monahan's meeting was snubbed by many players, suggesting he does have a long ways to go if he is to regain their trust after an about-face tour management policy.
Monahan said of Pazder:
Pazder had held the position of chief tournaments and competitions officer.
Per tax filings, he was paid more than $2.4m a year.
What's interesting about the timing of his departure is that he was recently appointed by Monahan to be on a committee that would seek to figure our pathways back to the tour for LIV golfers should they wish to return.
This committee, labelled the player benefit program, is also meant to be looking at ways to compensate players who did not leave for the rival league.
Jon Rahm expressed his opinion on this topic before the 151st Open, suggesting PGA Tour stars should not be compensated.
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"Everyone had a choice," said Rahm, although the Spaniard did say that he wouldn't object to more cash by way of a loyalty compensation fund.
Monahan later said that Tyler Dennis and Ron Price will assume Pazder's duties.
Pazder isn't the only high-profile exec to have resigned from his position on the PGA Tour this year.
He had wanted to resign quicker, Stephenson said in a statement, but didn't feel it was right given Monahan's health issues.
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