Roundup: Bigby set to return?

Taking a quick spin through the headlines before I head out to practice ...WORTH READING* S Atari Bigby practiced on Wednesday and seems to be on track to start Sunday against Detroit, barring a setback. Even if Bigby isn't spectacular in his return -- and he wasn't in the preseason -- he at least can ease the cornerbacks' minds that he'll play his assignments, something with which replacements Aaron Rouse and Derrick Martin struggled.* Injuries to CB Will Blackmon (ACL, placed on IR) and FB Korey Hall (calf strain, out at least two weeks) have opened the door for rookies Brandon Underwood and Quinn Johnson to be in uniform on Sunday.THE OTHER SIDELINE* New Lions coach Jim Schwartz changed just about everything when he took over a team that went 0-16 in 2008.* QB Matthew Stafford (knee) went through practice on a limited basis Wednesday, an important step toward playing Sunday. Top WR Calvin Johnson (knee) sat out and appeared stiff-legged.* The Lions signed veteran ...