OWINGS MILLS, Md. — In the midst of their second week of organized team activities, the Ravens were missing 10 starters during their voluntary workout on Thursday afternoon. Cornerbacks Jimmy Smith and Lardarius Webb, linebackers Terrell Suggs, Daryl Smith, and Elvis Dumervil, defensive end Chris Canty, and offensive linemen Jeremy Zuttah (offseason hip surgery), Eugene Monroe, Marshal Yanda, and Rick Wagner (foot) were all missing from the field as media observed practice. Jimmy Smith and Daryl Smith were both present for the first voluntary workout open to media last week. In addition to second-year wide receiver Michael Campanaro (quadriceps) already being sidelined until training camp, the Ravens confirmed wideout Aldrick Robinson suffered a Grade 2 medial collateral ligament sprain that will keep him out for the remainder of the spring. Starting left guard Kelechi Osemele was present and working after he was absent for last Thursday’s practice. Tight end Dennis Pitta was once again catching passes and working on an individual basis as he tries to come back from two serious right hip injuries in the last two years. Perhaps the biggest surprise of the spring has been the progress of safety Terrence Brooks (knee), who increased his activity level