Stu.The actor shared before-and-after photos of his progress over the course of three weeks in which he has visibly lost muscle mass and gained more fat.It’s all in preparation for his role portraying a professional boxer who becomes a priest named Father Stu.A post shared by Mark Wahlberg (@markwahlberg)Now, Wahlberg’s personal chef Lawrence Duran has told E! Online that the star is eating three times the average amount an adult consumes in a day to bulk up.The diet is strict and consists of