The Ravens shook up their personnel alignment at the safety position Sunday, but it didn't achieve the desired results. The defense allowed 383 passing yards and three touchdown passes during a 34-33 loss to the San Diego Chargers.
The Ravens began the game in a three-safety set with Will Hill at free safety, Jeromy Miles at strong safety and 2013 first-round draft pick Matt Elam at the big nickel spot.
Previously the starting strong safety, Darian Stewart played just three snaps on defense, a clear demotion.
Hill played every snap and had five tackles, one for loss. Miles played all but two snaps and had three tackles and a fumble recovery. Miles played solidly.
"I thought Jeromy Miles played really well," Harbaugh said. "I thought he went out there and really did a good job with the opportunity that was presented to him."
Elam allowed 3 of 4 completions thrown in his direction while he played 56 snaps and had seven tackles and one pass deflection. He was also penalized once for defensive holding and another time for illegal contact.
Elam lost his starting job earlier this season.
"Matt was OK," Harbaugh said. "He was solid."
One week after Terrence Brooks allowed a touchdown pass to New Orleans Saints quarterback Drew Brees and failed to react aggressively to a pass thrown over Elam's head, the rookie free safety didn't play at all on defense.
Cornerback Anthony Levine, a converted safety, got picked on repeatedly, allowing 9 of 10 completions on passes thrown in his direction for 75 yards. He was also flagged for defensive pass interference on a pass thrown to wide receiver Malcom Floyd that led to Rivers' game-winning touchdown throw.
Cornerback Lardarius Webb allowed Rivers to complete 4 of 5 passes thrown in his direction, including a touchdown pass to Keenan Allen where he was nowhere to be found in coverage.
"You just have to play better," Harbaugh said. "We have to make some plays back there. We had a couple things that were issues as far assignments. It's not really an assignment; it's the way you play the routes.
"We didn't play the routes a couple times right, led to some big plays. That's really what it boils down to. The other balls were contested balls and contested catches for the most part."