By Jelani Scott Kansas City was unable to ink Patrick Mahomes’ blingside protector to a long-term extension ahead of Friday’s deadline for franchie-tagged players. The Chiefs and franchise-tagged offensive tackle Orlando Brown Jr. were unable to reach a long-term deal ahead of Friday’s deadline, Brown’s agent Michael Portner told NFL Network. Kansas City placed its franchise tag on Brown, 26, earlier this offseason in hopes of keeping him off the market and working out a long-term contract extension. Now, according to NFL Network’s Tom Pelissero and Mike Garafolo, those talks have fallen apart…