The Mariners were careful not to use the word "retire" in announcing that Suzuki would become a special assistant to the chairman.
"Ichiro's new role will preclude him from returning to the active roster in 2018," the Mariners said in their statement.
"While this agreement only covers the 2018 season, it is our goal that Ichiro be a member of the Seattle organization long-term," Seattle General Manager Jerry Dipoto said. "As his role evolves over the 2018 season, it will inform the team and Ichiro on his best fit with us in 2019 and beyond."
Suzuki's celebrated return to Seattle this season had been less than triumphant.