The Mariners offense: Cal.
That's it.
Scouting report for teams playing the Mariners: just don't pitch to Cal, and it's an easy win 90% of the time. Pitch to Cal and you'll probably still win anyway because the chances of anyone else do anything is slim.
This team literally only has 1 bat that anyone else in the league is the least bit concerned about. The rest of the lineup is just easy to deal with for major league pitchers.