Who will the Mariners odd-man out be in the starting rotation?

BUFFALO, NEW YORK - JUNE 30: Justus Sheffield #33 of the Seattle Mariners throws a pitch during the fourth inning against the Toronto Blue Jays at Sahlen Field on June 30, 2021 in Buffalo, New York. (Photo by Joshua Bessex/Getty Images)

The Mariners added Tyler Anderson to the team just before the trade deadline in the hopes of shoring up their rotation, getting them a fifth starter. Now, they have a rotation of Flexen, Kikuchi, Gonzales, Gilbert, and Anderson.

However, what are Servais and the Mariners going to do when Justin Dunn and Justus Sheffield come back to the team from their injuries? That will give them seven starters, which leads to a few questions about what they will do for the…