Each week, I will ask for questions via Twitter with the hashtag #PackersMail and then will deliver the answers over the weekend.Nick Perry is a lock. The Packers still have high hopes for the third-year outside linebacker. He has only played in 17 games during his first two seasons due to injuries but when he has played, he's flashed pass-rush ability (six career sacks). Jerel Worthy and Derek Sherrod are in a different class. Worthy wasn't playing great before he blew out his knee in Week 17 of his rookie year and even when he did return late last season, he could barely get on the field. The Packers have plenty of other options on the defensive line if Worthy can't produce. Sherrod has another year in the NFL on Perry and Worthy, but the Packers might know even less about him because of the broken leg he sustained in late 2011 that kept him out for nearly two years. That's why this preseason is so big for Sherrod. He has to finally show whether he can play left tackle in the NFL. Eddie Lacy as their workhorse back. And they want to keep him on the field for all three downs this season. But that doesn't mean there's not a role for DuJuan Harris and James Starks. Look for coach Mike McCarthy to give Harris and Starks full series of their own while giving Lacy a breather. Also, perhaps the Packers will put in a special package for Harris to take advantage of his quickness and elusiveness. Micah Hyde looks like one of those players who always puts himself in a good position to make plays. He's not super fast, but he plays quick. He's not overly big (6-0, 197), but he plays bigger. At 6-1 and 208, Ha Ha Clinton-Dix, is bigger and perhaps more of a prototypical free safety in size and range. Clinton-Dix's upside is probably greater, but Hyde might be more steady at this point. Maybe someday they will be the Packers' two starting safeties. Colt Lyerla did not do much to stand out in the offseason. That does not mean we should write him off. He's an impressive-looking tight end prospect (6-4, 247) who looks like he can run. He just has not had the chance to show it off yet. He will get that chance in practice and in preseason games. Then we'll have a better feel for whether he can be a serious contender for a roster spot.