NFL firing wave leaves a quarter of teams without head coaches

After the Miami Dolphins fired head coach Mike McDaniel on Thursday, a quarter of the NFL now has head coaching vacancies.

The New York Giants and Tennessee Titans fired their head coaches midseason, giving them a leg up on starting a search while the rest of the NFL waited until after Week 18 to make a decision.

The Titans fired Brian Callahan in Week 7 after a 1-5 start and promoted senior offensive assistant Mike McCoy to serve as the team’s interim head coach. McCoy is unlikely to be hired as the full-time coach...