Aaron Boone had never coached or managed when general manager Brian Cashman hired him to take over a team that had come within a game of the World Series a year ago under Joe Girardi — and entered this season with championship aspirations. Boone went from someone Cashman said he “hardly knew” before the hiring process to the pick to lead the Yankees into their next chapter.

Since Memorial Day weekend is among the first markers in a season, The Post thought it was time to take a look at how Boone has done so far.

Among the reasons Boone beat out a handful of more experienced candidates was his willingness to embrace analytics. And in this stat-driven era, teams are relying more and more on data — and less on instinct and reaction. Though the manager might not have his hand in every move, as was the case for much of baseball history, Boone has done well in the decisions he’s made. Despite some inconsistent performances out of the bullpen, Boone has shown an ability to not overuse his relievers, even with injuries to key parts, like Tommy Kahnle and Adam Warren. He’s kept the full season in mind instead of overreacting to each game.

Grade: B+

Boone was tested on this front pretty quickly, when the Yankees got off to a sluggish start to the season. After a loss to Toronto in The Bronx, they were just 9-9 and already 7½ games behind the Red Sox. His outward attitude, though, hardly seemed to change through the rough opening weeks — when questions were already being raised about how he would handle the job. At times, he barely acknowledged the team’s faults — which seemed unrealistic, but then the Yankees followed up with 17 wins in 18 games. Boone’s manner — on the field, in the clubhouse, with the media — hardly changed, which is in contrast to his predecessor, since Girardi was visibly tense at times.

Grade: A-

Since he spent nearly a decade as a broadcaster — from the end of his playing days through last season — Boone was expected to be strong in this area, and so far has been. Having played in The Bronx, he understands the spotlight he’s under and has handled tough questions relatively well and with humor, though he occasionally lacks some information.

Grade: B+

Boone is a somewhat frequent visitor to the clubhouse, and the players appear to like having him around. And they certainly appreciate his willingness to defend them in public when they struggle.

Grade: A-

This one is hard to judge, since we’re not privy to behind-the-scenes meetings, but Cashman has heaped praise on Boone — a good sign — and Boone made an effort as soon as he got the job to spend time with front-office personnel at the winter meetings.

Grade: A

Boone kept several holdovers from Girardi’s staff — including pitching coach Larry Rothschild, bullpen coach Mike Harkey and hitting coach Marcus Thames, who was the assistant hitting coach. Two others, first base coach Reggie Willits and infield coach Carlos Mendoza, were already in the organization. Bench coach Josh Bard and third base coach Phil Nevin had history with Boone and have fit in well.

Grade: A-

When you’re still in your first month on the job and you go on a 17-1 run that has people talking about comparisons to the 1998 Yankees, that’s not bad. Boone certainly could have panicked during those early weeks when the Yankees stumbled out of the gate and the Red Sox looked like they were going to clinch the division by July, but he remained calm.

There have been a few missteps, which likely should have been expected. From the snafu in spring training, when Dellin Betances was taken out of a game after an inning and had to go back out to start the next inning because no one was up in the pen, to the play in Anaheim when Boone admitted to making a mistake by not knowing the boundary rules when he didn’t challenge a play in April. But his worst decision came Saturday night, when he opted to have Sonny Gray pitch to the Angels’ Mike Trout with first base open in the fourth inning after Trout had already doubled twice — and had already homered in two straight games. To no one’s surprise, Trout crushed a go-ahead home run.

It’s been an eventful first couple of months for the Yankees and Boone, as he’s steered them into a tight race with the Red Sox for the top spot in the division — as well as establishing the best record in baseball for a period recently. Cashman’s decision to get rid of Girardi and bring in the inexperienced Boone could have backfired instantly — and still could at some point — but at this point, no one can argue it was a mistake, which speaks to how well Boone has done.

Grade: A-