The Rays-Brewers World Series comes with a familiar twist for Seattle Mariners fans: plenty of former Mariners are still in the mix.
Seattle has never gotten a shot at the Fall Classic, but there are still a handful of ex-Mariners scattered across this year’s matchup who will be easy to spot if you’ve followed the organization closely. Here’s the full list.
Ben Williamson is the most recent former Mariner in the series, now with the Tampa Bay Rays. Seattle took him in the second round of the 2023 draft out of the College of William and Mary, and he spent much of last year as the club’s starting third baseman. He originally got his chance because there wasn’t much competition at the hot corner, but once the Mariners brought Eugenio Suarez back into the picture, Williamson was sent down.
Before the start of 2026, Colt Emerson’s looming debut left Seattle with more infielders than spots, and Williamson became the clearest extra piece, especially after he struggled against major league pitching. He was dealt to Tampa Bay in a three-team trade that brought Brendan Donovan to Seattle from the Cardinals.
Williamson’s season numbers landed right around where they were a year ago. He finished with a 74 OPS+ and 0.8 rWAR in 295 plate appearances.
His offense dipped a bit, and his defense slipped too, but Tampa Bay still found a use for him as a utility infielder. He played four positions and even logged five innings on the mound.
Jake Bauers is the former Mariner on the Milwaukee Brewers side, and his season line is the kind of thing that would make Seattle fans do a double take. He posted a 143 wRC+, seventh in MLB and ahead of names like Junior Caminero, Elly De La Cruz, and Shohei Ohtani.
Seattle got Bauers from Cleveland in 2021 after he had been designated for assignment. The return was cash, or a player to be named later. His Mariners stint never really got going, as he put up a 63 OPS+ across 202 plate appearances.
He left in free agency after that season, didn’t return to the majors until the Yankees called him up in 2023, and then landed in Milwaukee after a trade later that year. The real breakout came in 2025, when he finally posted an OPS+ above 100 for the first time in six big league seasons. With the way he’s played this year and the current state of the position player market, he could be looking at a strong free agent payday this offseason.
Freddy Peralta is listed with the Tampa Bay Rays, though his connection to Seattle goes back to the start of his pro career rather than an MLB stint. He signed as an international free agent in 2013 and spent his first three seasons in the Mariners’ Dominican Summer League and Arizona League systems before moving on.
Seattle sent Peralta and two other pitching prospects to the Brewers in the Adam Lind trade, a deal the organization likely looks back on with regret because of Lind’s struggles in 2016. Peralta developed into Milwaukee’s ace over time, then was traded to the Mets in his final year of club control.
His year in Queens was rougher, with a 4.99 ERA and 4.46 FIP over 113.2 innings. Still, he had enough upside left for Tampa Bay to take a chance on him at the deadline.
The move paid off quickly. He closed the year with a 3.25 ERA over his last 10 starts and then turned in a huge postseason run, capped by winning ALCS MVP.
Brody Hopkins is another Rays arm with Seattle ties. The Mariners picked him in the sixth round of the 2023 draft out of Winthrop University, and he quickly became the organization’s No. 26 prospect. Scouts liked the four-seam and slider combination, but Mariners fans only got 18 starts from him in Single-A before he was included in the Randy Arozarena trade.
His Triple-A numbers weren’t eye-catching, but Tampa Bay called him up in mid-September because of his “stuff,” as the article puts it. He made six big league appearances, finished with a 5.06 ERA and 6.29 FIP, and still earned a spot on the ALCS roster. He has yet to make his playoff debut for Tampa Bay, and that chance could come in a series that figures to be hard-fought against Milwaukee.
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