It's been a challenging year for a Seattle Mariners bullpen which in recent seasons has ranked well overall in the majors. They've had their ups and downs in 2025, ranking 13th in ERA, but also 20th in WHIP, tied-20th in opposing team batting average, tied-18th in strikeouts and 16th in fewest walks.
The last week in particular has been a disaster for the M's bullpen, with them pitching 23.1 combined innings in six games and producing a 8.10 ERA, which contributed significantly to going just 1-5 in that stretch. Not adding that extra reliever at the trade deadline appears to be costing the team and there's now some concern, which brings us to their latest signing.