COOPERSTOWN, N.Y. — It will be just like old times: Mariano Rivera closing out the day.

This time, however, he won’t have a baseball in his hand, but a speech to deliver, to somehow sum up a magnificent career that all great relievers will use as a measuring stick.

In another highlight to his storied career, Rivera will — of course — finish off a memorable day for one of the great Hall of Fame classes.

He will be the final of six Hall of Fame speakers addressing an expected capacity crowd behind the Clark Sports Center as the first player to get in unanimously. The first speaker, coincidentally, will be Mike Mussina, Rivera’s longtime Yankees teammate.

“When the career was done, at that point I said I might have a chance for Cooperstown,” said the humble and gracious Rivera, who will be inducted alongside Mussina, designated hitter Edgar Martinez, first baseman Harold Baines, starting pitcher Roy Halladay [who died in 2017] and fellow closer Lee Smith. “We’ll see what happens, and I end up here.”

Much like his career, the native Panamanian will stand alone on Sunday, as the only Hall of Famer to be named on all 425 Baseball Writers’ Association of America ballots. Ken Griffey Jr. came close, missing out on only three.

Rivera will enter the Hall as the greatest closer of all time (some will argue there never has been a better pitcher), the saves leader with 652 and part of five World Series champions with the Yankees — almost all on the strength of his cut fastball that tortured hitters for 19 seasons, carving up their bats like a knife through butter. The 1999 World Series MVP and 2003 ALCS MVP, Rivera went to 13 All-Star Games and has a career ERA of 2.21 (the 11th-lowest of all-time) along with a 0.70 ERA and 42 saves in the postseason.

“I never even thought I would make any All-Star teams. I didn’t play for those types of things,” Rivera said. “I played to win championships, and that’s what I was focused on. The rest was blessings from the Lord.”

The 49-year-old Rivera will find his way into many of the speeches on Sunday. Mussina said he wouldn’t have gotten to this point without Rivera closing so many of his 123 victories in pinstripes. There will be Martinez, the rare hitter to have success against Rivera, with 11 hits in 19 at-bats. Yet, Rivera won two of their biggest battles, retiring Martinez as the final out in the 2000 and 2001 ALCS. And then there is Halladay, the Blue Jays and Phillies hurler Rivera taught his cutter to during the 2008 All-Star Game.

“He did good and my guys got mad at me because I taught him, but it’s all right,” Rivera said of his one-time AL East rival. “That’s part of me. … If I was going to charge the guys that I gave advice, I would have made a lot more money. That’s how many players, hitters and pitchers I spoke to and gave them advice. I always want people to do good and to have success. If I had to do something for them to be successful, I would do it.”

During the rehearsal, Rivera joked with Mussina they should trade spots in speaking order, but Mussina would have none of it. It’s only fitting he will start and Rivera will finish — just as in so many wins over the years with the Yankees.

“We thought it was appropriate when they did it that way, that I would go first and he would go last,” Mussina said. “He wanted to trade. I said no. He didn’t want to sit it out there and go sixth.

“I told him to do what he did in the regular season, and wait until the seventh inning stretch somewhere, and then come out on stage. It will be the same.”