Santos, who was activated from the injured list last Monday, subsequently made two relief appearances during which he fired two scoreless innings while allowing one hit and recording one strikeout.
Santos got back on the bump at the major-league level for the first time since July 31 when he earned his second hold with a scoreless seventh inning in the series opener against the Athletics on Friday. He logged one more frame during Sunday's regular-season finale, getting through the eighth inning on just nine pitches. It was a modest but encouraging season-ending sample for Santos, who didn't make his 2024 debut until July due to a lat strain and then missed nearly two months with a biceps injury. The hard-throwing right-hander played on a one-year deal this season, and it remains to be seen if the Mariners will want to take another look considering Santos logged all of 7.1 innings across eight appearances due to the injuries.