Ask any Mariners fan who the most irreplaceable player on this roster is. The clear-cut answer to this question for the Mariners is JP Crawford and do not let anyone tell you differently. The strides he has made this year have turned him into a real player, and the type of player who can be a difference-maker for years to come in the Seattle Infield.
There is a case to make for Ty France for team MVP, but there is no denying the widespread impact JP has had on this team. For starters, if JP was to get injured or have to miss time there is nobody on this team who could fill that hole at shortstop.