LODI — Some fortunate students from Larson Elementary School in Lodi spent part of their Saturday afternoon with a local NFL star.St. Mary’s High and Boise State University graduate Doug Martin, a running back with the Oakland Raiders about to enter his eighth season in the league, answered some questions, signed autographs and played a little touch football at De Benedetti Park with six boys whose names were drawn in a school fundraiser or were invited to take part.