The San Francisco 49ers have Friday off before heading out to Owings Mills for three days of joint practices with the Baltimore Ravens. The 49ers will head to Baltimore dealing with plenty of injuries, but not too many more following the preseason opener. Demarcus Dobbs, Chuck Jacobs, and Lawrence Okoye all suffered various injuries on Thursday, but none appears to be overly serious.

Dobbs suffered an ankle injury in the first half that resulted in him leaving the game. After the game, word was that the ankle injury was minor. Lawrence Okoye suffered a left leg injury in the fourth quarter and left the game. The play before, Okoye had Quinton Dial roll up on his left leg on a run play. Okoye was on one knee immediately after the play, feeling the ankle. On the next play, Okoye went to drive forward at the snap, but immediately went down to the ground, reaching for his left leg. He walked off with a little bit of help, and said after the game that X-rays were negative. According to Cam Inman, Okoye needed some help from trainers after the game.

The defensive line is already incredibly thin with Justin Smith, Ray McDonald, Glenn Dorsey, and Ian Williams all not playing. Losing Dobbs and Okoye left the team with Tony Jerod-Eddie, Tank Carradine, Quinton Dial, and Mike Purcell. Will Tukuafu ended up getting work on the defensive line in the second half. It will be interesting to see what happens with Dobbs and Okoye given this lack of depth. If either is more injured than would initially appear, the 49ers might need to bring in another lineman, much like they've done at running back.

The other injury was to Chuck Jacobs, who suffered a hyper-extended right knee. He suffered the injury on a kickoff return, but all indications are that he was fine after the game. I wouldn't be surprised if he was feeling at least a little bit sore on Friday.

The 49ers remain a bit of a walking wounded squad, but things could have gone much worse against the Ravens. Defensive line is no longer all that deep in terms of training camp bodies, but this is also a group that is getting Justin Smith and Ray McDonald ready for the regular season. For now, guys like Tank Carradine and Quinton Dial will be getting significant snaps. They wore down on Thursday, and as Jim Harbaugh pointed out, the group was pushed around a fair amount by the Ravens offensive line. The good news is this is only the preseason and the young defensive linemen are getting a chance to sink or swim early.