MARIETTA, Ga., June 27, 2013 /PRNewswire/ -- In its 28th year of honoring the nation's best high school athletes, The Gatorade Company, in collaboration with USA TODAY High School Sports, today announced Kendell Williams of Kell High School (Marietta, GA) as its 2012-13 Gatorade National Girls Track & Field Athlete of the Year.  Williams was surprised with the news at Kell High School this morning.