Answer: 4
The Broncos fired Eric Studesville after his 1-3 record, replacing him with Josh McDaniels. The Cowboys dumped Wade Phillips after week 8 with only one win, paving the way for Jason Garrett. The Vikings fired Brad Childress after week 10 due to some internal problems and winning only three games. Leslie Frazier took the helm in place of Childress. The 49ers brass fired Mike Singletary before the last game of the season, and moved Jim Tomsula into the spot. The Cleveland Browns wasted no time, firing Eric Mangini one day after the season ended with consecutive 5-11 season records.