Say I have a Stunned opponent, and I roll to grapple them. Stunned says this:
- A stunned creature is incapacitated (see the condition), can’t move, and can speak only falteringly.
- The creature automatically fails Strength and Dexterity saving throws.
And the rules for grappling say this:
Using at least one free hand, you try to seize the target by making a grapple check, a Strength (Athletics) check contested by the target’s Strength (Athletics) or Dexterity (Acrobatics) check (the target chooses the ability to use).
Contests seem to be mentioned exactly once in a sidebar, and seem like they're just two regular Checks. By the strictest interpretation, grappling a Stunned opponent would still be contested.
However, characters also automatically fail their STR and DEX saves when Paralyzed, Petrified, or Unconscious. Only the peeviest DM would rule a Petrified character could make DEX checks, right?
Do the rules clarify this interaction at any point, or have the designers? If I make a grapple attempt on an unconscious foe, does he roll DEX to turn over, or what?