Kiko Alonso remained absent from practice Sunday while going through the league-mandated concussion protocol, but defensive coordinator Bill Davis did not sound concerned that Alonso's concussion would be an issue.

"Kiko's fine," Davis said. "I've been coaching linebackers my whole career. It's just part of that position, when it sneaks up on you nowadays, we have great protocol. It's not an issue. Kiko's doing great. He won't miss a beat."

Alonso suffered the concussion Tuesday. He has missed four practices. The league has a five-step concussion protocol, including clearance from an independent neurologist.

This is Alonso's first known concussion in the NFL. Coach Chip Kelly, who was Alonso's coach at Oregon, said Alonso did not have a concussion in college.

Message from Cowboys

Even though the Eagles were the only team on the field at Lincoln Financial Field, the rivalry with the Dallas Cowboys continued. Before practice, a plane flew over the stadium with a banner that read: "WE STILL DEM BOYZ!!!! #SACKSCOMIN."

Cowboys defensive end Greg Hardy and some of the team's fans financed the banner. Hardy contributed $300 to the cause. Eagles fans responded to the banner with chants that voiced their displeasure toward Dallas.

"It's no big deal," Eagles linebacker DeMeco Ryans said. "We're not concerned about them, but it seems like they're concerned about us."

Eagles fans raised money for a plane to tow a banner that said "We Got DeMarco" over the Cowboys' training camp site in Oxnard, Calif., according to

A banner-towing plane crashed and burned during takeoff Sunday at Compton-Woodley Airport in Compton, Calif., killing the pilot. It could not be determined if the plane had been hired to tow the banner with the fans' message.

Crowd at camp

More than 43,000 fans attended the public practice, the team announced. It was the second and final public workout of the summer.

The Eagles honored the military at practice. Kelly shook hands with members of the armed forces and players gave them their jerseys, which featured camouflage numbers.