The Seattle Mariners’ blockbuster trade for Josh Naylor in 2025 was hailed as a coup for the club, and for good reason. Naylor’s arrival helped spark a playoff push and justified both the deal and the $92.5 million contract that followed. But as the 2026 season hits its stride, the story is evolving—and fast. The Arizona Diamondbacks’ Brandyn Garcia, a left-handed reliever included in that same trade, is making a name for himself out west, and suddenly what once looked like a one-sided deal is starting to balance out in surprising ways.
Let’s set the stage: As of June 2, 2026, Josh Naylor is entrenched as Seattle’s everyday first baseman. With Cal Raleigh sidelined on the injured list, Naylor’s role has been even more crucial. Over the last 30 days, he’s hitting a robust .298 with eight stolen bases, helping the Mariners extend a six-game winning streak and maintain their position atop the division. His contact rate remains high, and his speed on the basepaths—once considered a bonus—has become a real asset. In fact, his 12 stolen bases in just 56 games this year prove that last season’s 32-steal breakout was no fluke.
Digging into the numbers, Naylor’s 2026 campaign hasn’t quite matched the power output of his 2024 career-high 31 home runs. Through 56 games, he’s batting .253 with five home runs, 20 runs scored, 24 RBIs, 12 steals, and 20 walks. Over the past two weeks, his power has temporarily dipped—he’s gone homerless in his last 14 days—but his overall production, especially with his legs, keeps his fantasy floor high and his team in the hunt. Projections still expect a rebound, with models pegging him for a .272 average and 20 home runs by season’s end. The Mariners’ upcoming schedule, featuring three home games against the Mets followed by a trip to Detroit, offers Naylor more opportunities to turn things around at the plate.
But here’s where the plot thickens. While Naylor’s steady presence is helping Seattle, Brandyn Garcia—sent to Arizona as part of the same trade—is quietly emerging as one of the most dominant bullpen arms in the National League. Garcia’s transformation from a fringe reliever to a top-30 prospect and now a bullpen stalwart has been nothing short of remarkable. Through 13 relief appearances in 2026, he’s allowed just one run on seven hits, with two walks and 11 strikeouts. The advanced stats are even more eye-popping: Garcia is holding right-handed batters to a .418 OPS and lefties to a .533 OPS. There’s no platoon trickery here—just pure, unadulterated dominance.
Garcia’s arsenal is headlined by a blistering 97.1 mph average sinker, but it’s his sweeper that’s really turning heads. The pitch boasts a 57.1% Whiff rate, ranking 15th among all pitches thrown at least 30 times this year. That’s elite company. It’s a far cry from 2025, when Garcia split time between Seattle and Arizona and was shelled for a 5.65 ERA over 14 appearances. What’s changed? According to team insiders, Garcia is attacking hitters more aggressively, getting ahead in counts, and trusting his stuff. The results speak for themselves: his rWAR in 2026 sits at 0.6, compared to Naylor’s -0.2. That’s a significant gap, especially for a reliever.
The Diamondbacks’ bullpen as a whole has benefited from Garcia’s rise. Their collective ERA has dropped to 3.92, nearly a full run lower than last season’s 4.82. Garcia has become a steady presence, joining a relief corps that includes Kevin Ginkel, Ryan Thompson, Taylor Clarke, Jonathan Loáisiga, Andrew Saalfrank, Andrew Hoffmann, and Juan Morillo. It’s a group that’s turned the page from a dismal 2025, and Garcia’s emergence is a big reason why.
Meanwhile, Naylor’s offensive profile in 2026 is a study in contrasts. While he’s hitting for average and stealing bases, his power numbers are down—a .344 slugging percentage, diminished exit velocity, and a lower hard-hit rate have raised concerns. Only five hitters in baseball have hit more ground-ball outs to the right side of the infield this year. It’s a far cry from the slugger who mashed 31 homers just two seasons ago. Still, the Mariners aren’t regretting the trade. Naylor’s base-stealing ability and consistent contact keep him in the lineup, and with projections pointing to a power rebound, there’s reason for optimism in Seattle.
Of course, fans on both sides of the deal are keeping score. Mariners supporters remember Naylor’s heroics from last year and appreciate his steady hand during a stretch when injuries have tested the team’s depth. Diamondbacks fans, on the other hand, are watching Garcia blossom into a high-leverage weapon—one who could anchor their bullpen for years to come. There’s even a sense that, after initial skepticism, the trade could end up as a win-win. As one observer put it, "Garcia is taking a major step forward while Naylor is stuck in place." That’s not entirely fair to Naylor, but it captures the shifting narrative.
Looking ahead, the Mariners have a critical stretch with six games this week, including matchups against tough starters like Freddy Peralta and Framber Valdez. Naylor is projected to hit .280 with active base-running during this run, and he remains a must-start option in all fantasy formats. Seattle’s pitching staff is holding up its end, with Emerson Hancock, Logan Gilbert, Bryan Woo, George Kirby, and Bryce Miller all contributing solid performances. The bullpen, anchored by Andrés Muñoz and Matt Brash, has been reliable, but it’s the offense—led by Naylor, Julio Rodríguez, and Luke Raley—that will determine how far the Mariners can go.
For the Diamondbacks, Garcia’s continued development could be a game-changer. If he maintains his current pace, he’ll not only solidify his spot in the bullpen but could even see higher-leverage opportunities as the season progresses. His aggressive approach, combined with his devastating sweeper, makes him a nightmare for opposing hitters—righties and lefties alike.
Trades like these are rarely settled in a single season. The Mariners’ acquisition of Naylor paid immediate dividends, but Garcia’s breakout is shifting the calculus. Both teams have reason to feel good about their end of the deal, and with the season far from over, there’s plenty of baseball left for the story to evolve even further. As the Mariners chase another playoff berth and the Diamondbacks eye a bullpen-driven turnaround, all eyes will be on these two players—and the legacy of the trade that linked them.
For now, Mariners fans can enjoy Naylor’s speed and steady glove, while Diamondbacks faithful watch Garcia mow down hitters with newfound confidence. The scoreboard may not tell the full story, but one thing’s clear: this trade is far from finished making headlines.