Pierce the tenderloins with a knife/fork and then place into a sealable plastic bag or a bowl and cover with marinade. Marinate for at least 1 hr or up to 8 hrs in the refrigerator.
Remove the turkey tenderloins from the refrigerator 30 mins before grilling.
Grill turkey tenderloins on the BBQ for ~8 mins. Flip and cook for an additional 6-7 mins until the internal temperature reaches 155° F.
Remove from the grill. Tent with aluminum foil and let it rest for 10 mins before serving.