The 49ers just blew another 10-point fourth quarter lead and lost 24-23 to the Arizona Cardinals. Now the 49ers are 2-3. Here are their grades for this pathetic performance.

Two weeks after faltering on the road to the Los Angeles Rams, the 49ers blew another 10-point lead and exited with a 24-23 loss to the Arizona Cardinals, who went ahead on Chad Ryland’s 35-yard field goal with 1 1/2 minutes to go. As the Bay Area heat wave continued, temperatures on the field reached nearly 115 degrees.