St, John’s Shrewsbury announced on Saturday evening the hiring of Dr. Gary Senecal as the school’s new head football coach.  A Worcester native, Senecal brings a wealth of experience to the position and a deep connection to the Worcester community. He has coached at several schools including his alma mater, St. Peter-Marian High School, as well as Keefe Technical High School, the University of West Georgia, Assumption University, and has……