Browns defense depleted? 

September, 7, 2013
9/07/13
12:15
PM ET
A Cleveland Browns defense expected to be much improved may not show signs of its total strength this week as key pieces will be missing. Impact rookie linebacker Barkevious Mingo will not make his NFL debut against the Miami Dolphins in Week 1 due to a bruised lung. Without Mingo, the Browns will have less speed coming off the right side and might play more conservatively on defense against Miami.