Pittsburgh Steelers head coach Mike Tomlin worked with the defensive lineman during the opening day of Senior Bowl practices. MOBILE — The Pittsburgh Steelers will be looking to bolster their defense at all levels in this coming NFL Draft, and head coach Mike Tomlin got a jump on scouting defensive prospects at the Senior Bowl in Mobile, Alabama, this week. Tomlin was taking a special interest in the defensive lineman and Keion White, a 6’5, 285-pound edge rusher from Georgia Tech. White believes he is a versatile player who can play all over the defensive line. He learned how important…