The Detroit Lions will once again be without left guard Jonah Jackson, but center Frank Ragnow is expected to return and is listed as questionable. The Detroit Lions have declared their injury designations ahead of their Week 3 matchup with the Minnesota Vikings, and while they will still be missing their starting Pro Bowl left guard, Jonah Jackson, it appears they will get starting All-Pro center Frank Ragnow back in the lineup. Note: Any changes from yesterday’s injury report will be bolded. Ruled OUT G Jonah Jackson (finger) DL John Cominsky (wrist) Jackson missed practice all week, and while he…