Sam Allardyce has admitted that he expects to see more managers lose their jobs before the end of the season.
Championship sides Queens Park Rangers and Huddersfield Town both parted company with their coaches this week, taking the total number of sackings across the Football League this season to 16.
The Sunderland manager, who took over at the Stadium of Light last month after Dick Advocaat resigned, told reporters: "It's not unusual. We've had it before, although there's been a change recently. There used to be more sackings in the lower divisions than anywhere else. If you survived more than a year you were doing well.
"Now, though, it's happening mainly in the Championship because those clubs are getting more foreign owners who want to turn them into Premier League outfits. If they don't quite get there, the managers fall foul of these new regimes. The financial promise of the Premier League means that, this year, more Championship managers than ever might lose their jobs."
Six clubs in the Championship have fired their managers so far this season.