SAN FRANCISCO >> OK, Buster, go make some memories.

That was the job description from Buster Posey last October when he was named the Giants’ president of baseball operations. He invoked Willie Mays, Willie McCovey and Gaylord Perry as well as Will Clark, Jeff Kent, Matt Cain, Brandon Belt and Brandon Crawford.

“We’re in the memory-making business,” Posey said.

The great experiment is at home for the first time today with Posey in charge of the organization he helped make a champion three times in five years when the Giants face the Seattle Mariners at 1:35 p.m. at Oracle Park.

“I’m beyond excited,” Posey said Thursday on KNBR. “I think I’ll be able to take in the pageantry and it looks like the weather is going to be beautiful. We’ll have a packed park, and I mean, it doesn’t get much better. Wife and kids are going to be the there. It’s going to be a great day.”

It happened so fast that Posey got the job title before the statue outside the stadium. Before he was eligible for the Hall of Fame.

So far, so good. The Buster bandwagon is picking up steam. The Giants are 5-1, have won four in a row and are getting good pitching, timely hitting and legit defense.

Posey has operated from the safe distance of the Giants’ ownership board in 2022 and an advisory position before offering himself up to chairman of the board Greg Johnson when things reached the point of no return with his predecessor, analytics cruncher Farhan Zaidi.

No longer.

Posey will be given a lot of rope, befitting a franchise icon who received almost nothing but fawning praise from the media and fan base since exploding onto the scene. In short order, Posey was the National League’s rookie of the year in 2010 as the Giants won their first World Series in San Francisco, suffered a brutal ankle fracture in a home plate collision with Scott Cousins in 2011 and then won a batting title, an MVP and another World Series ring in 2012.

Another ring would follow in 2014, and voila, Posey was not only destined for Cooperstown but the historical face of the franchise.

Bigger than the late, great Mays, McCovey and Orlando Cepeda and even Barry Bonds. Bonds helped get a new ballpark built in 2000, but it was Posey who took the Giants to a level of success they may never know again.

Posey had few if any peers at running a baseball game from behind the plate, where every player was in his full view. We don’t know if he can run a baseball operation from behind a desk with unforeseen circumstances coming at him from all angles.

At 38, Posey went right to the top. He bypassed scouting, coaching, managing or the broadcast booth. There is scant evidence Posey is capable of this. There’s even less evidence that he’s incapable. How the Giants develop under Posey is the most intriguing storyline of the 2025 season.

Imagine Stephen Curry retiring after the season and coming back to run the Warriors in 2029. Or if Joe Montana had never been traded to the Chiefs, retired, and was the general manager when the 49ers won the Super Bowl in 1994 with Steve Young at quarterback.

John Elway retired from the Denver Broncos in 1998, became a club executive after successful forays into business and won a Super Bowl at Levi’s Stadium, but that was years after he stopped playing.

Jerry West was a successful NBA executive but only after starting in coaching when his playing days were over with the Los Angeles Lakers.

Magic Johnson is a successful businessman and part-owner of the Dodgers, but didn’t stick either as Lakers head coach in 1994 or president of operations in 2017.

John Lynch went from the Tampa Bay Buccaneers to the Denver Broncos to the broadcast booth before being hired as the general manager of the 49ers by Kyle Shanahan.

None of those examples parallels what Posey is attempting in terms of taking on the final say of a franchise so quickly.

The Giants won’t adhere to analytics and computer printouts to the extent that they did under Zaidi, using the data as additional information rather than a guide. Like every baseball executive that ever lived, Posey is big on fundamentals, defense and playing the game the right way.

Posey will have some sway when it comes to attracting talent. Matt Chapman was signed to a six-year contract extension worth $151 million under Zaidi with Posey pushing for it behind the scenes. Shortstop Willy Adames arrived in December on a seven-year deal worth $182 million.

The left side of the infeld is secure into the future.

Tellingly, Posey made little effort to bring back Blake Snell, a left-hander who got a late start in 2024, went from awful to brilliant, bypassed his last start, opted out of his contract and then signed a five-year contract with the Dodgers.

Speculating from the cheap seats, it’s not difficult to see Snell’s penchant for running up 100 pitches or so in five innings and then taking a spot on the bench wouldn’t be compatible with what Posey would want from a starting anchor.

The Giants also reportedly didn’t make much of an effort to sign starting pitcher Corbin Burnes to a megadeal.

Instead, Posey went after a polished right-hander who is four years his senior in Justin Verlander to get whatever is left out of his 42-year-old arm as well as share his knowledge and philosophy with some promising young pitchers.

Like Posey, manager Bob Melvin’s background is as a catcher. So Posey and Melvin should be compatible.

But to be in charge of the organization when it comes to talent acquisition, instituting a culture and having the final say to build for the future goes way beyond the machinations of preparing a team to play on a daily basis.

If you’re into legacies, Posey’s is secure as a player no matter how his front office stay turns out. He’ll have his ballpark statue and Hall of Fame induction ceremony someday, possibly as soon as 2027 when he’s eligible after having been retired for five years.

By then, we should have our answer on the Giants’ great experiment of making Posey the leader of the franchise as opposed to being just the face of one.