In a significant mid-season move, the Arizona Diamondbacks have traded third baseman Eugenio Suarez back to the Seattle Mariners, as reported by Jeff Passan of ESPN. This transaction marks a return for Suarez to a familiar environment, as he was originally acquired by Arizona from Seattle less than two years prior, during an offseason trade after the conclusion of the 2023 season.

The Diamondbacks will receive three top-20 prospects from the Mariners in exchange for Suarez, according to Ken Rosenthal of The Athletic. Notably, Tyler Locklear highlights this group, ranking as the No. 9 prospect in Seattle's system, as per MLB.com evaluations. Suarez has had an impressive performance this season, producing a .248 batting average along with 36 home runs and 87 runs batted in, adding to his previous year's achievement of 30 home runs and 101 RBI. His standout season has earned him his second career All-Star selection and recognition as the National League Player of the Week on four occasions. A remarkable highlight of his 2025 campaign includes becoming only the 19th player in MLB history to hit four home runs in a single game during a contest against the Atlanta Braves. Additionally, Suarez has surpassed the 300 home run milestone earlier this season.

Despite his status as one of the premier power-hitting third basemen in Major League Baseball, Suarez has experienced challenges in finding a permanent home throughout his career. He debuted with the Detroit Tigers in 2014 and was subsequently traded to the Cincinnati Reds the following year. After seven productive seasons with the Reds, he was acquired by the Mariners, who retained him for two seasons before his recent trade to the Diamondbacks. The return of Suarez to Seattle is expected to bolster the Mariners' lineup significantly, especially as the team looks to enhance its playoff aspirations with a current record of 57-51. The addition of a formidable power bat like Suarez should complement star catcher Cal Raleigh as the Mariners pursue a postseason berth.