|Photograph by Al_HikesAZ used|
through Creative Commons license
Purchase an orange-on-navy (not white-on-navy) Detroit Tigers cap.
Remove the sterile backing from an extra-large adhesive bandage and attach it to your left jaw-line.
Using spirit gum, attach a scouring pad to your chin. (If possible, avoid pads impregnated with soap, such as Brillo. Be sure to purchase spirit gum remover at the same time that you buy the prosthetic adhesive.)
If your friends are not baseball fans, you may need to purchase a Benoit road jersey. This should be avoided if possible, as a matter of economy and subtlety.
There you have it: your Joaquin Benoit Halloween costume.