Live from Owings Mills: Ravens missing four offensive starters from practice

OWINGS MILLS, Md. — Rain storms throughout the area forced the Ravens to move their Monday afternoon practice indoors, but the current state of the interior offensive line appears even more threatening.
With center Matt Birk sidelined after undergoing knee surgery two weeks ago and right guard Marshal Yanda missing his third straight practice with back spasms, left guard Ben Grubbs and receiver Anquan Boldin were not participating on Monday. It’s unclear whether it’s merely a day off for Grubbs — who had offseason ankle surgery — and Boldin, but both made it through Sunday evening’s practice without incident.
With Grubbs, Birk, and Yanda not practicing, rookie Justin Boren was working at left guard while Bryan Mattison and Oniel Cousins filled in at center and right guard respectively.
Others missing from Monday’s workout included receiver James Hardy (hamstring) and rookie running back Damien Berry.
The Ravens received good news earlier in the day when second-year receiver David Reed passed his physical and came off the active physically-unable-to-perform list. The 6-foot return specialist was practicing Monday after missing the first three weeks of camp after undergoing offseason wrist surgery.
Earlier on Monday, the Ravens released rookie defensive tackle Terron Sanders and signed former USC kicker-punter Jake Harfman to simply ease the workload of Billy Cundiff and Sam Koch.