Bears linebacker Nick Roach is still concerned about the danger surrounding kickoffs in the NFL. "I think the most dangerous thing on a kickoff isn't the distance you have to cover, it's the type of blocks that are allowed on the kickoff return team," Roach said. "You'll see a lot of trap blocks, where say I'm the third guy running down from the sideline on the right side -- running down the field and thinking nobody is blocking me because I see a wedge forming in front of me about twenty yards away. But then a guy on the kickoff return team will come from across the field, the complete other side, to blindside me from my inside out. "Those are by far the most dangerous hits. It's just like a complete blindside shot when you are wide open running down the field in a total sprint. You never see that coming and they totally take you off your feet sometimes." The linebacker suffered a concussion covering a kickoff during Chicago's first preseason game of the 2009 season in Buffalo. NFL owners voted Tuesday to move kickoffs up to the 35-yard line starting next season to increase the number of touchbacks and decrease the number of injuries on kick returns. Under the new rules, coverage players are only allowed to take a five-yard running start -- compared to a 10-to-15-yard head start under the old rules -- before the kicker makes contact with the ball.