A question re: The Fantasticks casting

I'm casting a production of "The Fantasticks" for a group of students. I'm wondering if, historically, the Mute and Mortimer have ever been doubled? I'm trying to find a way to sell the role of the Mute to a student who might feel his or her time is spent on better things than playing a non-speaking, singing or dancing role.

Thanks!

I'd be teaching him that old adage about no small parts! What an excellent teaching opportunity!

I certainly wouldn't keep another actor from having a part just to make a different one feel better.