Here's why: They want a jump-start on picking their next coach.
With Jacksonville already looking for a coach, the Chiefs and Dolphins couldn't afford to wait.
That's why Kansas City fired Todd Haley Monday and the Dolphins followed by firing Tony Sparano.
Firing a guy with three games won't turn things around. What it does is give these teams a chance to dip their toes into the coaching pool for names like Bill Cowher, Jeff Fisher and Jon Gruden.
Time is important. Waiting will only bring in more suitors once other coaches are fired.
This isn't about now.
It's about the future.