The Mariners could toss Brian Johnson, Jalen Beeks and/or Mike Shawaryn on their heap of starters/long relievers who would pitch no more than four innings a game in the suggested wolf pack* approach.
The problem would be finding room on the 40-man roster.
The Mariners are in the market for a defensive catcher to back up Mike Zunino so Blake Swihart would not fit the bill. Seattle already has its Brock Holts in Taylor Motter, Andrew Romine and Zach Vincej.
* http://m.mariners.mlb.com/news/artic...ing-offseason/