With him being only 16 years old now, i'd say he's got some growing to do, which in turn means, he'll be able to get that speed down. For him to play a LB type position, he'll need to get that speed down in the 4.5 to 4.6 range. He'll prob stay put at D-End, possibly a stand up D-End. He's got a great foundation to work with a 6'3'' frame