Texans missed punt block could have been challenged by Colts?

Ultimately would be 4th down again, not automatic 1st down Week 9: Colts at Texans (video at :53) "The Texans looked to have got away with one," said NBC announcer Al Michaels, as the Texans snap the ball to eliminate the possibility of the previous play being challenged. On a 4th-and-9 punt, Colts

Can umpire make calls for referee?

Former umpire Jim Daopoulos breaks down responsibilities There was a play in the Texans-Patriots divisional playoff game that seemed curious to me.  Late in the second quarter referee Tony Corrente flagged the Texans for roughing the kicker.  Umpire Garth DeFelice consulted with Corrente, and the referee turned on his microphone and