Burning Questions should be the offseason slogan for the 2013 Buffalo Bills.
Following a front office reconstruction, which resulted in major roster turnover, there's much more that we don't know about the Bills compared to what we do know.
With training camp here, let's dive into the most compelling questions that will be answered soon enough.
From a physical and on-field production perspective, Da'Rick Rogers was one of the top wide receivers in the 2013 draft class.
Unfortunately for him, his off-field transgressions were the reason he went undrafted.
Rogers wears his ferocity on his sleeve on the field, and although he's not the biggest receiver and doesn't possess elite speed, Rogers has a desirable overall skill set.
If the former Tennessee Volunteer stays out of trouble, he should find a comfortable spot within Buffalo's receiving corps and contribute immediately, but he'll still have to earn it at camp.
Andy Levitre will be blocking for C.J. in 2013, it's just that C.J. will now refer to Chris Johnson, not C.J. Spiller. That means the Bills must fill Levitre's vacated spot at left guard.
Colin Brown is listed as a center, but he can play guard, as can many of Buffalo's interior offensive linemen.
But free-agent acquisition Doug Legursky has 50 games of NFL experience on his resume, and is the early favorite to start between Cordy Glenn and Eric Wood.
Stevie Johnson is the clear-cut No. 1 receiver in Buffalo; that much is known.
But the No. 2 wideout spot is vacant and ready to be occupied. Robert Woods, T.J. Graham, Marquise Goodwin, Da'Rick Rogers, and technically a host of others, will be fighting for that secondary starting gig.
Woods is ready to produce right away, Graham has a year of professional experience under his belt and Rogers is the most physically gifted wideout of the bunch.
With so much uncertainty in the Bills' receiving corps, the battle for the No. 2 receiver spot will be a juicy one.
Marquise Goodwin was a yards-after-the-catch stud at the University of Texas, although his overall receiving numbers weren't stellar.
He only caught 26 passes in 2012, but he ran the ball 12 times for 156 yards and three touchdowns.
Goodwin's 4.27 speed can't go unnoticed, and though he's not the most agile wideout, there's some wiggle to his game when he reaches the open field.
The presence of EJ Manuel brings a plethora of new-age, read-option possibilities to Buffalo's offense, and Goodwin should be the recipient of a variety of quick, high-percentage passes from that formation.
He'll likely test secondaries down the field, too.
Mike Pettine runs a "multiple" defense.
Not strictly a 3-4, 4-3 or anything in between.
With a front-seven personnel grouping that favors more of a traditional 4-3 look, it'll be intriguing to see how Pettine implements 3-4 sets and the nickel package.
Will Mario Williams stand up more often than he has his hand in the dirt? How about Kyle Williams? Will Stephon Gilmore assume a Darrelle Revis-esque role?
There should be a dizzying amount of substituting and shifting on the defensive side of the ball in camp.
Mario Williams was relatively stagnant in 2012, playing left defensive end for most of the campaign.
Basically, his usage was a microcosm of how defensive coordinator Dave Wannstedt ran the entire defense.
Boring and predictable.
With Mike Pettine at the defensive helm, that should change.
Expect Mario inside, outside, rushing from the quarterback's blindside, lining up as an outside linebacker and so on.
The collective defensive effort must improve from a ghastly 2012, and Williams will be a vital piece of the puzzle.
C.J. Spiller is the unquestioned featured back in Buffalo, and following a frustrating season in which he tallied a staggeringly low 207 carries, some Bills fans are yearning for a 350-carry campaign.
Fred Jackson was one of football's most elusive and well-rounded backs in 2011 before he was bit by the injury bug.
With both healthy, how Nate Hackett decides to utilize these skills backs in preparation for the regular season will be worth monitoring.
Duke Williams and Da'Norris Searcy.
Those are the two players who'll be vying for the starting strong safety spot. Searcy has appeared in 31 games for the Bills since being drafted in 2011, but he hasn't made much of an impact with only one career interception.
Williams brings a hard-hitting, ultra-physical mentality to the field, yet he wasn't a liability in coverage at Nevada.
The two should fight for the spot next to Jairus Byrd, or whoever starts at free safety to begin the year.
Da'Rick Rogers is the biggest name of Buffalo's undrafted free agents, but he's not the only one with a chance to make the Bills roster.
Outside linebacker Keith Pough, cornerback Nickell Robey, offensive lineman Zack Chibane and receiver Brandon Kaufman all stand decent chances.
A few sleepers always surprise at training camp, so don't instantly dismiss the guy with the number you don't recognize.
Jairus Byrd is Buffalo's franchise player, but since the July 15 multi-year deal deadline passed, he's not under contract and has decided to hold out.
Theoretically, he could hold out into the regular season, but that's when significant fines will be levied.
In all likelihood, the All-Pro safety will play under the franchise tag tender of $6.9 million in 2013.
With Mike Pettine installing a complex defensive scheme, the Bills would probably like Byrd back in camp as soon as possible.
Ah, yes, the quarterback competition. The competition everyone will be focused on this August at the lovely and quaint St. John Fisher College.
Kevin Kolb can be serviceable behind a stonewall offensive line, but his pocket presence is about as shaky as it comes, and he's been exceptionally fragile in his entire career.
EJ Manuel has all the physical tools but must be coached on the fine details of playing the quarterback position in the NFL, something that's much more difficult than doing so in the ACC.
These two will fight for reps and, hopefully for Buffalo, bring out the best in each other.