David IM'ed me this:
"Another statistics for the vaunted 49ers: "If every pass a quarterback throws clangs to the ground incomplete, his rating is 39.6 under the NFL's cryptic system. In Week 16, San Francisco starting quarterback Ken Dorsey finished with a 26.7 passer rating and was lifted for Cody Pickett, who finished with an 18.8 rating." [...]