KAJAKI, Afghanistan – Second Lt. Jeff Lenar is a long way from the bright lights of college football at the U.S. Naval Academy, and it took serious discipline to get there. The infantry officer with 1st Battalion, 8th Marines, leads 2nd Platoon, Alpha Company, overseeing Marines in combat who patrol near the landmark Kajaki Dam in Helmand province. Since deploying early this year, he has led his platoon in raids into Taliban-held area and overseen surveillance missions used to collect information about insurgents. His trip there was complicated: to join his fellow Marines, Lenar shed dozens of pounds from his…