The idea to give Joe Mauer one last moment behind the plate was a popular one. So popular, in fact, that it’s impossible to know in whose head the spark initially appeared.

“I’d like to claim the idea as mine. but I had no part in the origination of that,” said Paul Molitor, the Twins’ manager at the time. “I was part of the initial discussions, but there were a few steps to get to that point.”

Molitor will be part of a large St. Paul contingent in Cooperstown, N.Y., next weekend to celebrate Mauer’s induction into the Baseball Hall of Fame, where on Sunday Mauer will join Molitor (2005), Dave Winfield (2001) and Jack Morris (2018) as St. Paul natives enshrined in the hall.

No one can quite agree on exactly whose idea it really was to give Mauer one last moment behind the plate. Among those playing a role were then-bench coach Derek Shelton, replay coordinator Nate Damman, traveling secretary Mike Herman, public relations chief Dustin Morse and equipment manager Rod McCormick. But it’s hard to pinpoint its inception.

What remains clear, six years after that 5-4 victory over the Chicago White Sox, is that implementing the plan required some convincing.

Certainly, the White Sox — the Twins’ opponent on Sept. 30, 2018 — had to acquiesce to letting Mauer don his catching gear for the first time in five years and take a single pitch in the eighth inning of the season finale at Target Field. They turned out to be the easy part.

“I know I had to make that phone call to include the White Sox, and that they didn’t really balk at all,” Molitor said.

More difficult to convince were Molitor himself, who said Saturday, “I wasn’t on board right away,” and Mauer himself.

“One of the big (hurdles) was Joe’s feelings about it — his concerns for the integrity of the game and the other club,” Molitor recalled. “He didn’t want to take away a moment, even if it was just one pitch.”

During a teleconference facilitated by the hall on Friday evening, Mauer acknowledged his hesitance after being approached about it during a meeting with Molitor, Shelton and Damman in the manager’s office.

“When they brought it up, I started to kind of cry. It was just very emotional,” he said. “I wasn’t really thinking that, and when I first heard it, I didn’t want it to be about me. I wanted to finish the season strong, and we had a lot of young players on that team; I knew that even though we were out of it, I wanted to kind of show them that when you become a major leaguer, you go out there and play every game and you finish the season.”

By then, Molitor had softened to the idea and worked with the others to convince Mauer it was OK.

“Hearing their reasons for it, and hearing from Mollie, it wasn’t about me — it was about a lot of people there who experienced my career and kind of grew up with me — that it was much bigger than me,” Mauer said. “I’m glad I took that opportunity.”

Mauer, 41, produced a stack of highlights on the field over the years, but that last pitch might be his most indelible moment of his career, at least here in the Twin Cities, where he became a three-sport star at Cretin-Derham Hall and played his entire 18-year major league career.

As soon as the 30,144 in attendance noticed that it was Mauer, trademark red-white-and-blue batting helmet on his head, coming out in catcher’s gear, it rose spontaneously into a standing ovation. With Yoan Moncada taking the pitch — he later doubled — Mauer crouched behind the plate one last time and took a pitch from reliever Matt Belisle before taking a moment to soak in what amounted to a communal goodbye hug.

That moment, Mauer said Friday, was the one that finally cemented his decision to retire.

“It was the last year of my contract, and I was 35 years old. I had missed time with a concussion that season,” he said. “Those thoughts kind of come back in, at least for me. ‘Is this gonna be it?’ I really didn’t know. All I knew was I wanted to finish the season strong.”

Minnesota has always loved Mauer, but it also had been hard on him — for not hitting more home runs, for grounding into double plays, for missing 80 games with “bilateral leg weakness” in 2011 and not playing in more games generally. Mostly, Mauer’s critics were mad at him for being a good first baseman, a decision made after he suffered a serious concussion behind the plate in 2013, instead of the best catcher in baseball.

Mauer remains the only catcher to win three batting titles, and his remarkable 2009 season — .365 batting average, 28 home runs, 96 runs batted in, Gold Glove — was one of the best by any major league catcher. He won the American League Most Valuable Player Award that fall, and in the spring he signed an eight-year, $184 million contract extension.

He never had another season like that one. No one did. But it was a disappointment for a segment of Twins fans that expected, or at least hoped for, that to be the norm from the No. 1 overall pick in the 2001 amateur draft — especially after he hit .327 with a .408 on-base percentage (!) in his first six seasons.

And they wouldn’t let it go.

But all that melted away in the ninth inning of that last game, when he caught one last pitch after hitting the last of his club-record 428 doubles in his last at-bat. Finally, Mauer felt that unconditional love again, and knew it was time — even if he spent part of his postgame news conference feigning indecision.

“To really think it over, and having some time to process what (had) just happened,” he said Saturday, “all those signs were basically telling me, ‘It’s OK. It’s OK to be done. You had a great run, and it’s time to go and enjoy your family.’ And it’s been great ever since.”

Sunday’s induction ceremony begins at 12:30 p.m. CDT and will be televised by MLB Network.