ARLINGTON, TX - JANUARY 03: Tony Romo, left, and head coach Jason Garrett, right, of the Dallas Cowboys react after the Washington Redskins intercepted during the second half at AT&T Stadium on January 3, 2016 in Arlington, Texas. (Photo by Tom Pennington/Getty Images)

NFL says Cowboys can't honor murdered Dallas cops with logo, and that's worse than stupid

Another black eye for the league.

The Dallas Cowboys' request to the NFL to wear a decal on their helmets to show support and pay tribute to the Dallas police department has been denied according to Fox.

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The Cowboys have been wearing an "Arm in Arm" decal since the first day of training camp. According to the report, "strict rules on uniforms" forced the league to deny the Cowboys.

According to TMZ, Sergeant Demetrick Pennie, president of the Dallas Fallen Officer Foundation, is unhappy with the decision

"The NFL had an opportunity to be leaders and advocates for change in law enforcement," Pennie says.

"These teams and players have a spotlight on them and could have helped bring awareness. If a uniform policy is keeping them from this, then why don't they have every team wear the decals?" 

Dallas kicks off its preseason slate against the Los Angeles Rams on Saturday. The regular-season slate begins Sunday, September 11, against the New York Giants.