not yet. weis didn't know anything (or was unwilling to report anything) at sunday's press conference. the latest reports seem to be that he's being re-evaluated today by the medical staff and weis will address it tomorrow.
regardless, i'd be shocked if he wasn't out for at least this week. expect grimes and hord to work their way into the rotation.
Apparently McKnight is out for next week, but its not a season long injury. He underwent a "procedure" that will prevent his return for one week, but not long term.