Fans who thought the 49ers were fighting some bad energy around Mike Singletary may have been on to something. With Singletary in charge, the 49ers often looked like a team that played tight and were afraid to make mistakes. "I think we did play tight," Vernon Davis said. "Guys were a little scared. They were more worried about coach Singletary getting on them than playing football." Interim coach Jim Tomsula made it his mission last week to get the 49ers to have fun. The 49ers responded with a 38-7 victory over the Arizona Cardinals.