If the Philadelphia Eagles are finding a successor for Lane Johnson, the future Hall of Fame right tackle isn't close to hanging up his cleats. The Eagles had one pick in the third round after trading away their second pick in the round for Jonathan Greenard, backing themselves into selecting an offensive lineman with the No. 68 overall pick. Philadelphia took Markel Bell, a massive tackle prospect that fits the offensive line identity. Bell is listed at 6-foot-9 and 346 pounds, but prefers to play between 350 and 360 pounds. A towering presence at tackle, Bell was a force in leading the Miami Hurricanes to the national title game this past January. Bell didn't allow a sack in his lone season as the starting tackle for the Hurricanes, using his 87 7-8 wing span to push over defenders in the run game. There's a lot to like about Bell as a prospect, but he won't be starting at tackle any time soon. Bell is a prospect for a reason, and won't be taking over at right tackel for Lane Johnson any time soon.…