The Seattle Mariners have received a potentially encouraging development regarding starting pitcher Emerson Hancock as the club continues its push toward the postseason.
Hancock, who has emerged as one of Seattle’s more dependable starters this season, is making progress from a left adductor strain. Although his recovery appears to be moving in the right direction, the Mariners have yet to establish a firm timetable for his return with the regular season approaching its final stretch.
The right-hander was placed on the 15-day injured list on August 29 after sustaining the injury during his August 28 start against the Toronto Blue Jays. The incident occurred in the opening inning when Hancock moved to field a ground ball near first base and appeared to twist awkwardly while making the play.
Despite the discomfort, Hancock did not immediately leave the game. Instead, he remained on the mound and threw another 61 pitches before completing five innings. The decision to continue pitching demonstrated his willingness to compete through the issue, but the injury ultimately forced Seattle to place him on the injured list.
Hancock recently took another important step in his rehabilitation. After going approximately 10 days without throwing from a mound, he completed his first bullpen session on Wednesday.
The session represented a significant milestone because it gave the Mariners an opportunity to evaluate how Hancock’s injured muscle responded to pitching movements. Rather than throwing at maximum intensity, Hancock worked at what he described as a normal midweek bullpen level while incorporating his complete pitch repertoire.
Mariners manager Dan Wilson viewed the workout positively, describing it as “pretty good.” However, Hancock acknowledged that the injury has not completely disappeared.
The primary concern remains his left leg, which serves as his landing leg when he delivers a pitch. Hancock said he still occasionally experiences discomfort when planting that leg and moving toward home plate.
That detail is particularly important for Seattle because a starting pitcher must repeatedly generate force through the legs during a full outing. Even if Hancock is feeling better away from the mound, the Mariners need to be confident that he can handle the demands of pitching without aggravating the injury.
Following Wednesday’s bullpen session, Hancock said he felt all right and believed he was continuing to improve. Nevertheless, Seattle is taking a cautious approach.
Another bullpen session is expected to take place in the coming days. The results of that workout could determine the next major step in Hancock’s recovery and whether the Mariners believe he is capable of returning to the starting rotation.
Hancock is eligible to come off the injured list on September 13. However, simply becoming eligible does not necessarily mean he will be ready to pitch immediately.
Because he has already missed roughly two weeks of action, Hancock would likely need to rebuild his workload before being trusted to handle a normal starter’s responsibilities. The Mariners also have to consider the potential risk of pushing him too quickly during an important portion of the season.
One option Seattle has not ruled out is moving Hancock into the bullpen when he returns.
A relief role could provide the Mariners with a quicker path to getting him back on the active roster while reducing the number of innings he would be expected to throw. It could also allow the club to monitor his workload more carefully as he continues recovering from the adductor issue.
Such a move would represent a significant change for Hancock, especially considering how valuable he has been to Seattle’s rotation this year.
Before suffering the injury, Hancock had established himself as one of the team’s most reliable starters. Through 25 starts, he had posted a 3.57 ERA over 138.2 innings, both impressive figures considering the right-hander’s previous struggles at the Major League level.
Hancock entered the 2026 campaign with a career 4.81 ERA across 37 games. His performances during the 2024 and 2025 seasons were also inconsistent, as he recorded a 5.01 ERA across those two seasons.
This year, however, Hancock took a noticeable step forward.
He entered the All-Star break with a 3.17 ERA and a 1.01 WHIP, demonstrating improved consistency and effectiveness. His fastball was also among the most productive pitches in the league, ranking in the 99th percentile in run value.
At the same time, Hancock increasingly incorporated his sweeper into his approach, giving opposing hitters another pitch to deal with and helping him become a more effective starter.
His development has been particularly important for Seattle because the club’s rotation has undergone several changes during the season.
The Mariners traded Luis Castillo before the trade deadline, creating another opening in the starting rotation. Rookie Kade Anderson has stepped into that opportunity and earned his first Major League victory on Wednesday.
Meanwhile, Bryce Miller has faced his own challenges. After struggling during the summer, the Mariners have managed his workload carefully.
Those circumstances could make Hancock’s eventual return even more valuable. Seattle is entering a critical stage of the season, and having another dependable arm available could provide an important boost to the pitching staff.
However, the Mariners cannot afford to sacrifice Hancock’s long-term health simply to get him back on the mound for a few additional regular-season games.
The upcoming bullpen session will therefore carry considerable significance. If Hancock experiences little or no discomfort while throwing, Seattle could begin considering a progression toward game action.
If the discomfort persists, however, the Mariners may have to delay his return or reconsider how they intend to use him.
A relief assignment could ultimately become the most practical solution. Hancock made several bullpen appearances last September, meaning the role would not be completely unfamiliar to him.
For now, Seattle appears focused on taking the recovery one step at a time.
Hancock’s first bullpen session was a positive development, but it was only one stage of the rehabilitation process. The next workout should provide the Mariners with a clearer indication of whether he is ready to increase his workload.
With the postseason race heating up, Seattle will undoubtedly want Hancock back as soon as it is reasonably safe. At the same time, the organization has plenty of reason to be cautious with a pitcher who has delivered the best season of his career.
For Hancock, the immediate objective is simple: continue building strength, eliminate the discomfort in his landing leg and prove that he can pitch without risking another setback.
If he successfully completes his next bullpen session, the Mariners could have a clearer path toward bringing him back. Whether that return comes as a starter or reliever remains uncertain.
What is clear is that Hancock’s recovery has reached an important stage, and his next test could play a major role in determining how Seattle handles its pitching staff down the stretch.
With the Mariners battling for postseason positioning, every healthy arm matters. If Hancock can return without complications, his presence could provide Seattle with another valuable weapon at precisely the time the team needs it most.
