Cardinals trying to avoid blackout

TEMPE, Ariz. -- The NFL has given the Arizona Cardinals a 24-hour extension to the television blackout deadline for Sunday's game in Glendale against the Houston Texans.

In order to air live on local television, league rules require games to be sold out 72 hours prior to kickoff.

Arizona's blackout deadline has now been extended until 11:15 a.m. EDT Friday.

As of Thursday afternoon, the Cardinals say they have less than 1,000 tickets remaining to be sold.

The Cardinals have sold out all 36 games played at University of Phoenix Stadium, which opened in 2006.