Cowboys sign 13 undrafted rookies

The Cowboys announced the signings of 13 undrafted rookies Friday as the team started a weekend rookie minicamp. The 13 players who signed were defensive end Caleb Azubike (Vanderbilt), center Jake Brendel (UCLA), wide receiver Chris Brown (Notre Dame), nose tackle Rodney Coe (Akron), cornerback Arjen Colquhon (Michigan State), wide receiver Ed Eagan (Northwestern State),…