Jacoby Jones' sprained right knee means the Ravens will probably need short-term assistance on offense and special teams.
The Ravens, for a variety of reasons, have shown no interest in perusing the slim veteran free agent market that includes Brandon Lloyd, Braylon Edwards, Laurent Robinson, Austin Collie, Josh Cribbs and David Nelson.
Plus, Deonte Thompson has made progress from a sprained left foot that has kept him out since the first preseason game. If Thompson can regain his health, he could provide a deep threat on offense and speed on kick returns.
Undrafted rookie strong safety Brynden Trawick was downcast in the locker room after accidentally crashing into Jones and causing him to sprain his right knee.
Trawick had his helmet tilted downward, decking Jones while he was signaling for a fair catch on a punt return. Jones was scheduled to have a magnetic resonance imaging exam Friday.
"I just didn't see him," Trawick said. "It was bad on my part. There's not much I can say, for real."
Harbaugh has already addressed the miscue with Trawick.
"I talked to him about it, tried to teach him that he's got to be willing to turn his head," Harbaugh said. "That's an experience problem, he's an inexperienced guy. It's a new situation for him."
Harbaugh deal averages $6 million
Ravens coach John Harbaugh's four-year contract extension is in the $6 million range, according to a source.
There were reports that Harbaugh was making $7 million per year under his new contract, which was finalized months ago.
Under contract through the 2016 season, Harbaugh, a Super Bowl winner who's led his team to five consecutive playoff appearances, is one of the highest-compensated coaches in the NFL.
The top-paid coaches are the New Orleans Saints' Sean Payton ($8 million), New England Patriots' Bill Belichick ($7.5 million), Kansas City Chiefs' Andy Reid ($7.5 million) and Seattle Seahawks' Pete Carroll ($7 million), according to Forbes.
No setbacks for Webb
Cornerback Lardarius Webb made it through unscathed in his first regular-season game since tearing his anterior cruciate ligament last October.
Webb played solidly overall, deflecting one pass.
"I feel great, happy to be back out there," Webb said. "But we lost."
Higher pay for Furstenburg
Rookie tight end Matt Furstenburg is at a higher level of compensation under his practice squad contract, a sign of respect and an acknowledgement that other teams might offer him a spot on their active roster.
The former Maryland player makes $8,000 per week instead of the standard $6,000 practice squad salary for a total of $136,000.