The Cleveland Browns began their offseason laser-focused on addressing their two main roster needs: the offensive line and wide receiver group . Even as the team saw an army of offensive linemen -- including four starters from the beginning of  last season -- and a couple of fan favorites like tight end David Njoku and linebacker Devin Bush  walk in free agency, the team’s focus never seemed to waver. Between free agency and the NFL Draft, the Browns have added no less than 11 new players to those position groups, ensuring a massive infusion of talent at the two most vulnerable spots on the team.  However, a trio of roster moves made early in the free agency period that flew under the radar helped the Browns’ front office stay on course in addressing their most pressing needs, without needing to invest valuable resources on another phase of the game that needed attention: special teams.…