SAN DIEGO — Craig Stammen can still picture the poster on the door of his childhood bedroom in Ohio, the one paying tribute to three World Series-winning relievers. Shown towering over Riverfront Stadium were Norm Charlton, Rob Dibble and Randy Myers, a Cincinnati Reds trio known as The Nasty Boys.“I just remember when it got to the seventh inning, the game was over,” Stammen said.Now the manager of the San Diego Padres, Stammen is overseeing his own formidable bullpen, one featuring a historic back-end duo. Closer Mason Miller is the hardest-throwing right-handed reliever in the big leagues. Set-up man Adrian Morejon, whose average fastball velocity has climbed nearly 2 mph since last season, is the hardest-throwing left-handed reliever.It’s the first time since at least 2008, when Major League Baseball began comprehensively tracking pitch speeds, that both quantities have resided in the same bullpen. If the lore is correct, it might be the first time since the right-handed Dibble and the left-handed Myers lit up radar guns on their way to postseason glory in 1990.“Yeah,” Stammen said with a smile, “we got some Nasty Boys.”The Padres, interested in doubling down on their strength, have considered pursuing another elite reliever ahead of the Aug. 3 trade deadline. In any event, they already have the sport’s nastiest bullpen arm.Miller leads the majors in such categories as strikeout rate (51.2 percent), average fastball velocity (101.3 mph) and average miss distance (7.1 inches). He has not allowed an earned run in 30 of his 32 appearances, and one of the exceptions involved an umpire blowing a crucial call.But Miller’s dominance spans multiple seasons. The last extra-base hit against him came Aug. 5, when Arizona’s Lourdes Gurriel Jr. turned on a 103.9 mph fastball. Less than two months later, Miller established a pair of postseason records, painting the outside corner with a 104.5 mph four-seamer and striking out eight consecutive batters.Adrian Morejon topped out at 101.7 mph earlier this season. (Orlando Ramirez / Getty Images)Meanwhile, Morejon has made a measurable leap. His average fastball velocity (99.4 mph) is noticeably up from last year (97.6 mph). His 3.43 ERA is skewed by a poor-luck April; the lefty has permitted an earned run in only one of his past 21 appearances. According to Pitching+, a metric that judges the quality of a pitcher’s process, no one in the majors is throwing the ball better.“His stuff is amazing, but he’s pitching. He’s commanding the baseball,” Miller said. “That command is something that you don’t see with a guy that throws that hard, very often.”Blessed with rare arm talent but previously slowed by injuries, Morejon broke out as a full-time member of the bullpen in 2024. In 2025, he went to his first All-Star Game and threw 100 mph in a game for the first time. Over the offseason, Morejon, 27, focused on strengthening his shoulders and back. The 5-foot-11 reliever came into spring training at a stout 224 pounds.The result: In his Cactus League debut on March 3, he touched 100 mph. Two weeks later, in another exhibition, he hit 101.2 mph. He has maintained that kind of velocity ever since, topping out at 101.7 mph.“Morejon is really strong. I think that’s one thing people don’t realize,” said fellow Padres lefty Kyle Hart. “He’s extremely strong, but everything’s just so late, and there’s so much whip, and when you combine that with a high level of strength, you’re going to hit 100. You’re going to hit 101.”The increased velocity has produced a competition of sorts. With 80 regular-season games left, Miller has thrown 87 pitches of at least 101.7 mph.“He’s getting pretty close, so I’m getting a little worried,” said Miller, who has reached 103.8 mph this year.“I’ve got a long way to go until I get to Mason’s miles per hour,” Morejon said through interpreter Jorge Merlos, “but we’re just messing with each other and helping each other along the way.”The Padres are benefiting, too, and not simply from peak velo.Miller’s slider, which averages 87.8 mph, is the most devastating weapon in the sport. In 68 at-bats ended by the pitch, opponents have mustered eight singles and struck out 46 times.Morejon, who introduced a low-90s kick-change a year ago, is throwing that pitch almost 20 percent of the time. This season, it’s yielded just one extra-base hit.“It takes him to another level because now he’s got an unpredictability of attack,” Padres pitching coach Ruben Niebla said. “Not only is it adding another pitch, but he added a really good pitch.”More additions could be on the way this summer. The Padres survived the past week’s 4-2 homestand against a pair of first-place teams in the Atlanta Braves and the Los Angeles Dodgers, but the roster’s lack of starting pitching and offense remains obvious.Five weeks before the trade deadline, San Diego also could use another high-leverage arm. Morejon is on pace for what would be a career-high 82 innings. Miller has been asked to take down four or more outs in six games. The Padres, according to team sources, continue to eye a still-developing reliever market.Their list of possible targets includes baseball’s hardest-throwing left-hander over the past 16 seasons. Even if the Padres don’t end up acquiring Aroldis Chapman — who is still touching triple digits at age 38 — the Boston Red Sox closer seems to be making an impact from across the country.“I have a very good relationship with Chapman, and we’ve been talking a lot,” said Morejon, who, like Chapman, was born in Cuba. “I use him as a reference a lot as well, just in his work ethic and the stuff that he does to get himself prepared for every day.”For now, the Padres will settle for having the sport’s most dominant bullpen duo — and perhaps the hardest-throwing left-right combination in at least 36 years. When a reporter recently pointed out the potential parallel between Dibble-Myers and Miller-Morejon, a native Ohioan beamed.“You put a smile on my face bringing that up,” Stammen said. “I’m going to start calling those guys The Nasty Boys.”