The 49ers' eighth consecutive season without a playoff appearance has cost Mike Singletary his job as the team's head coach, as reported by The 49ers announced the firing Sunday night after the team returned to its headquarters following a 25-17 defeat to the Rams earlier in the day. Defensive line coach Jim Tomsula will coach the team's game against Arizona in Week 17. Singletary, 52, went 5-10 this season and 8-8 in 2009, his first as head coach in full. He posted a 5-4 record as interim coach after the team fired Mike Nolan during the 2008 season. Team president Jed York told reporters after the 49ers' loss Sunday that the team would hire a GM.