It’s a common occurrence in college football. Head coaches come, and head coaches go. It’s not an epidemic. It’s the natural order of the sport.

There’s a reason why eyes and ears are constantly directed towards the coaching hot seat and carousel. 

But it’s not often that coaching changes are made during the season. In fact, since 2000 there have been six years in which no in-season FBS changes were made. Only three seasons saw more than two in-season coaching changes.

But this year has gone wildly against the grain. A total of seven coaches who started the season are now no longer with their respective teams.

Below is a year-by-year look at the shakeups.

• 2000 – 0
• 2001 – 1
• 2002 – 2
• 2003 – 5
• 2004 – 0
• 2005 – 0
• 2006 – 0
• 2007 – 0
• 2008 – 1
• 2009 – 0
• 2010 – 2
• 2011 – 4
• 2012 – 2
• 2013 – 3
• 2014 – 2
• 2015 – 7

We’ve seen some of those changes come via retirement: Steve Spurrier, George O’Leary and Jerry Kill.

Kill stepped down as the head coach of the Minnesota Golden Gophers Wednesday because of health issues.

There have been some flat-out firings, too.

The USC Trojans let go of Steve Sarkisian, North Texas dismissed Dan McCarney, Miami parted ways with Al Golden, and Maryland sent Randy Edsall packing.

Just missing the cut on this list is former Illinois coach Tim Beckman, who was released just a week before the Fighting Illini’s first game of the season.

MORE: College Football Coaching Hot Seat