already getting tested Once all the inside linebackers are healthy and under contract for the Chicago Bears http://www.authenticschicagobears.com/cheap-bryce-callahan-jersey , this position group should be a real strength. But so far at camp, this is the thinnest position group on the roster. So thin, that they had to sign a guy off the street just to be able to practice two deep at the position. Week one against the Packers is still a long way off, so it should all work out, right?Roster LocksRoquan Smith will sign eventually. My guess is by the weekend if not before. If this drags on another week I'll be concerned, but so far his absence is in the news because the Bears are only one of two teams that have reported to camp.Players only have so much wiggle room when it comes to their contracts, so I don't fault them for getting everything they can. The Bears are just protecting their interests Youth Taylor Gabriel Jersey , but at some point they need to realize getting Smith locked up and at practice is the best thing for the franchise. Fellow rookie Joel Iyiegbuniwe tweaked his shoulder and has been held out for a couple days now. The Bears discovered Danny Trevathan's hamstring injury on the first day of camp, and we haven't heard much about it since then. This could very well be them being extra cautious with a player that is a no-doubt-about-it starter. Nick Kwiatkoski has benefited from the extra time with the ones in camp, but his roster spot was never in question. He was even spotted working some at outside linebacker during camp so far, which would line up with the offseason reports that the Bears were thinking about having him slide into the Christian Jones (ILB/OLB) role. A good bet to make itEvery year of the Vic Fangio era, the Bears opened up with four inside linebackers on the 53-man roster, so if we go off that, then those four I listed as locks will make it awfully hard for a bubble guy to break through. But if one were to make it as a fifth ILB...On the bubble... I think that would be John Timu. I've always liked the way Timu plays football. He's not the most athletic http://www.authenticschicagobears.com/cheap-kyle-long-jersey , but his instincts are sound and he's made himself into a decent special teamer. Josh Woods, who is converting from defensive back, and Ro'Derrick Hoskins, who just signed yesterday, are both trying to impress enough to make the practice squad. EDIT: Depth concerns led the Bears to add Ro'Derrick Hoskins, but he'll have an uphill climb to the final roster.Bears have PFF's No. 1 defense through two weeks The Chicago Bears were ranked as the best defensive team in the NFL through two weeks by Pro Football Focus on Tuesday.Statistically, the Bears have been one of the better units in the league Youth Eric Kush Jersey , but to see them so highly ranked is a bit surprising. After Monday night's win against the Seattle Seahawks, the Bears have allowed the 11th-lowest points per game with 20.5, with 35 of their 41 points allowed having come in the fourth quarter. They also rank eighth in yards allowed per game with 323.However, the Bears do have their fair share of high rankings. They rank first in the league in sacks with 10, and they hold a first-place tie with the Cleveland Browns with five forced fumbles. Chicago's 71.5 rushing yards allowed per game is also the fourth-lowest total in the NFL.Here's how the Bears stack up with the five defenses below them on PFF's list:Compared to the other top-tier defenses, the Bears have held their own in every category. The real booster that gets them over the top is their run-support grade, which is 7.8 points higher than any other defense in the top six.Specific details regarding each team's grades are a part of PFF's premium plan and can be accessed by subscribers of the website.Not taking the fourth quarter into affect http://www.authenticschicagobears.com/cheap-danny-trevathan-jersey , the Bears have been the most dominant defense in the NFL. With the likes of Khalil Mack, Akiem Hicks, Eddie Goldman and Danny Trevathan all having played at a high level to start off the year, the potential of this group is palpable. Being able to close their games could make them truly worthy of being the best unit in the league.Jacob Infante is a Chicago Bears writer at SB Nation's Windy City Gridiron. He is also the lead NFL Draft analyst for The Blitz Network, and he additionally covers the NFL Draft for USA Today's Draft Wire. He can be reached through Twitter @jacobinfante24 or e-mailed at jacobinfante1208@gmail.com.