Facing mounting instability and sitting five games below .500, the Seattle Mariners are actively listening to trade offers for pitcher George Kirby ahead of the Monday Trade Deadline. Despite swirling discussions and heightened market interest, team plans still point toward Kirby making his scheduled Sunday start against the Minnesota Twins.
Marketplace Pressure and Front Office Discussions
The state of the marketplace in Seattle has reached its most unstable point of a season that began with high expectations, according to league sources. As of Saturday morning, opposing clubs engaged the Mariners more aggressively regarding the availability of George Kirby ahead of the Monday 3 p.m. PT Trade Deadline. Despite intense discussions, multiple teams checking in expect that they would be surprised if he ultimately gets dealt, per MLB.com’s Mark Feinsand. Lots of talking happens at this time of year,
a source with knowledge of the Mariners’ discussions told the outlet.
This sudden willingness to discuss a homegrown cornerstone points toward a potential outlook shift within the Seattle front office. The pivot follows a disappointing 2-5 road trip and a Friday night homestand-opening loss to Minnesota at T-Mobile Park, which dropped the ballclub five games below .500. Although the Mariners rebounded on Saturday with a 4-3 walk-off win—driven by Cal Raleigh’s walk-off fielder’s choice that scored Randy Arozarena from third base on a close, head-first slide—the team remains mired in third place in the American League West.
Evaluating Kirby Against Castillo and Hancock
The emergence of Kirby’s name in trade conversations suggests that prospective traction on alternative starting pitchers like Luis Castillo and Emerson Hancock might not be as strong across the league. Castillo, 33, carries a heavy financial commitment: he is due the remainder of $24.15 million this season, another $24.15 million next year, and features a $25 million vesting option for 2028 should he accrue 180 innings in 2027. Consequently, any return for Castillo was expected to be marginal, potentially requiring the Mariners to absorb a portion of his salary and attach a prospect.
Hancock presents a different profile, currently navigating his first solid season as a major league starter. At 27 years old, he is more affordable, earning the league minimum through next season, and remains under club control through 2030. Yet, Kirby represents the superior talent and is viewed by many within the organization as possessing the highest upside of the entire homegrown rotation. Other clubs clearly recognize that potential, despite Kirby registering a 4.10 ERA (94 ERA+, where league average is 100) across 43 starts over the past two seasons. Earning $6.55 million this year, Kirby faces arbitration eligibility for his final two seasons before reaching free agency after 2028.
Weighing Roster Needs and Extension Realities
Industry evaluations have long considered Kirby the least likely among Seattle’s controllable starters to sign a contract extension prior to reaching free agency. That reality could influence how the front office views his long-term value, particularly with Kade Anderson—MLB Pipeline’s No. 5 overall prospect—waiting in the wings within the minor league system.
Up until a 5-9 skid immediately following the All-Star break dropped them below .500 on July 22, the Mariners maintained their intention to operate as active buyers. However, operating within a buyer-heavy market all summer signaled that the front office might need to trade established pieces to acquire vital roster upgrades, specifically a right-handed bat and bullpen help. Entertaining external inquiries on Kirby aligns with this strategy, or alternatively, marks a tactical shift into a hybrid buy-and-sell approach aimed at salvaging a weak division race while simultaneously stocking up for 2027 and beyond.
Playoff Odds and Sunday Matinee Preparations
Entering Saturday, FanGraphs data put the Mariners’ odds of making the playoffs at 40.8% and their chances of winning the American League West at 28.7%, ranking them third in the division behind Texas and Houston. Intriguingly, Seattle held a 4.1% probability of winning the World Series—the highest among those three division rivals and the third-highest across a weak American League, trailing only the Yankees at 12.1% and the Rays at 6.4%. They’re a very good team,
another American League executive remarked of Seattle.
A definitive test of whether Seattle is genuinely open to trading their prized right-hander centers on Sunday’s schedule. Kirby completed his full pregame preparation on Saturday, and manager Dan Wilson confirmed after the afternoon victory that the current plan is for Kirby to take the mound for Sunday’s matinee against the Twins.
