[caption id="attachment_26870" align="aligncenter" width="416"] Ronald Martinez / Getty Images[/caption] After a disappointing 8-8 season in 2012 the Pittsburgh Steelers will be looking to once again retake the AFC North. But will their offseason additions, in both the draft and free agency, be enough to remain competitive in the toughest division in the NFL? I'm not so sure. The biggest question surrounds whether or not they can keep quarterback Ben Roethlisberger healthy for an entire season. He hasn't played all 16 games a year since 2008, the season the Steelers last won the Super Bowl. His most recent injury was to his knee, surgically-repaired in June. Thankfully he has already been throwing and appears ready for the upcoming camps. When asked about his condition this week he responded by saying that the knee "feels great.. better than ever," and by all accounts we should have a rare 100 percent Big Ben for the 2013-14 season. Another question must be asked, more generally, of the Steelers' offense, particularly with regards to their receiving group. With the loss of speedster Mike Wallace to the Dolphins in free agency, the Steelers need to find another deep threat. To this end they matched the Patriots' offer for Emmanuel Sanders, keeping the explosive 2010 third-round pick for the time being. You could argue Sanders had something of a breakout season in 2012, managing 44 catches for 626 yards and one touchdown. He'll need to step up as the absolute WR2 beside Antonio Brown. But how good is he really? It remains to be seen. But keep in mind last year was the first time Sanders had been healthy for an entire season. Antonio Brown is of course the other option, and should be Big Ben's primary target this season. He'll need to prove he's up for the task after taking a step back in 2012, only managing 787 yards on 66 catches and five touchdowns, over 300 yards less receiving than his 2011 effort (1,108 total yards). Rookie Markus Wheaton looks to fill the spot at WR3, despite getting off to a slow start with the organisation due to a delayed college graduation. His quickness could make him an ideal slot receiver, but we'll need to wait and see how new offensive coordinator Tood Haley uses him in camp. Either way he should beat out veterans Jerricho Cotchery and Plaxico Burress. The rushing attack also stalled in 2012 (ranked 26th in the NFL), and with Rashard Mendenhall finding a new team this season the Steelers will start 'fresh' with Jonathan Dwyer, Isaac Redman and rookie Le'Veon Bell. Bell looks like the likely candidate for the majority of touches, but must improve his pass blocking first before he can truly become the team's new bell-cow. Both Redman and Dwyer showed flashes last season, both are more than able blockers too so they figure to remain a major part of their offence. Assuming they get some better production from their offensive line this season -- possible given the return of guard David DeCastro and their moving of Mike Adams to right tackle -- the run game could develop into a genuine strength of the team. But in reality there's more questions than answers on the Steelers offensive line, and we won't know until the preseason whether or not they've improved. Despite being consistently labeled old and slow by the media they're still consistently old, slow and the No. 1 ranked defense in football. Granted, while the Steelers D has always been about swarming a quarterback and confusing with misdirection -- typically something you need speed on defense to do -- their 75-year-old defensive coordinator Dick LeBeau always keeps the Steelers defensive dangerous, regardless of personnel. They're getting younger, anyway, with linebacker Jarvis Jones and safety Shamarko Thomas both looking to be likely starters in 2013. Ultimately, the defense will be the least of the Steelers' troubles. Pittsburgh have history on their side. Since the turn of the century every time the Steelers placed third or worse in their division they came back to win it the next season. Read into that what you will but for a team with such a long history of dominating the AFC North, failing to even place second is a strong motivator. To be competitive this season the Steelers need a healthy Big Ben, and to do that they'll be forced to lean on their running game and an improved offensive line. Their defense will continue to keep them in games, but it's the offence that has the biggest question mark and the offence that'll determine whether or not the Steelers will bounce back in 2013.