07:06 AM ET 05.21 | If Pittsburgh is going to prove its doubters wrong in September, as Mike Tomlin predicts, the work begins this week. The Steelers begin the first day of 13 offseason practice days -- 10 OTAs and three minicamp sessions -- Tuesday, and Tomlin will begin working through an extended check list of concerns, worries and question marks. Among them: LaMarr Woodley's weight. Troy Polamalu's overall health. Ben Roethlisberger's receivers. Dick LeBeau's always-aging defense. The relatively young offensive line. The who's-on-first situation at running back. The who's-going-to-replace James Harrison scenario at outside linebacker. And there's this: For the first time since Tomlin took over as coach in 2007, the Steelers aren't considered to be one of the AFC's elite teams or an AFC North frontrunner.