As of three weeks ago, Rivers has been sacked 20 times and his average time per sack is 2.4 seconds, which is 2nd worst in the NFL only to Arizona. He's since been sacked 12 times since then. The six sacks from Baltimore this week came at 2.4, 2.5, 2.6, 2.3, 2.3, and 4.6 seconds.
Terrible o-line combined with Norv's deep, slow developing plays = poor quarterback play. Like I said, no QB would be successful under these circumstances.