Baltimore Ravens offensive coordinator Marty Mornhinweg didn't offer much clarity Wednesday when asked about quarterback Joe Flacco's return date to practice.

"I think I know," Mornhinweg said. "At least, Joe thinks he knows when this will happen. So that way, I think I know. So, we think we know. Look it, if it's before that or a little bit before -- it probably not going to be much before -- or a little bit after, we'll adjust the plan. As long he's back in a reasonable amount of time to prepare, I think we'll just be fine there."

Flacco hasn't practiced since the start of training camp because of a back issue. Two weeks ago, the Ravens announced that Flacco wouldn't play in the preseason but indicated "the plan" is for the 32-year-old quarterback to start the Sept. 10 regular-season opener.

Coach John Harbaugh ruled out Flacco from practicing this week, which means the earliest Flacco would return is Aug. 27. That would give him two weeks to prepare for the regular-season opener in Cincinnati.