Report: Athletics acquire reliever Seth Johnson from Phillies, sending outfielder Colby Thomas to Philadelphia

The Athletics and Philadelphia Phillies are reportedly closing in on a trade that would reshuffle both clubs' player needs for the rest of the season. According to Jayson Stark of The Athletic, the Athletics would acquire reliever Seth Johnson from the Phillies in exchange for outfielder Colby Thomas.

In a deal framed around bullpen value and everyday depth, the centerpiece on the Athletics side is Johnson, a reliever the Phillies are understood to be willing to trade. For the Phillies, the return would be Thomas, an outfielder who can provide organizational depth and additional options for a club that tends to weigh roster flexibility at the back end of the summer roster window.

The report’s framing suggests a trade built more on role and timing than on a long-term position-player pipeline. Late-season acquisitions in MLB often prioritize pitchers who can help immediately, and they usually do so with the expectation that a new arm can slot into established bullpen usage patterns quickly. On the other side, the Phillies receiving Thomas would be banking on an outfield option that can help cover innings and provide managerial choices, particularly as lineups turn over more often during the final stretch.

Still, the information at this point remains report-level rather than confirmed transaction paperwork. MLB Trade Rumors and Stark’s report indicate “more to come,” but they do not provide additional terms or context such as roster protections, additional players, or any conditional elements. Because of that, details that often matter to how a trade is ultimately evaluated, including the precise roster status at the time of the move, should be treated as unverified until the teams make an official announcement.

For the Athletics, acquiring Johnson would fit a common mid-to-late summer approach: if a club is not positioned to chase a postseason spot, it often focuses on adding established bullpen pieces that can stabilize late innings and also help define how a bullpen can be structured into future seasons. For the Phillies, moving Johnson would represent a choice to trade some immediate relief depth for an outfield solution. Philadelphia’s roster construction, like most contending teams, typically weighs both near-term production and the ability to withstand the attrition that comes with day-to-day lineup changes.

What to watch next is straightforward. First, whether the trade is officially announced and finalized by both clubs. Second, how each team’s personnel plan changes right away, particularly with bullpen roles and outfield usage. If the deal becomes official, the next storyline will be how Johnson is integrated into the Athletics’ late-inning relief group and what kind of playing time the Phillies envision for Thomas.