NFL briefs: Helmet hits harmful

Philadelphia wide receiver DeSean Jackson suffered a concussion and Atlanta cornerback Dunta Robinson injured his head in a nasty head-on collision in the second quarter of the Eagles’ win.

Both players stayed on the turf for several minutes before being helped from the field. Jackson dropped a pass when hit by Robinson, who led with his head and hit Jackson in the helmet. Robinson was flagged for hitting a defenseless receiver.

Cribbs leaves game

Browns wide receiver Joshua Cribbs was leveled by a helmet-to-helmet hit by the Steelers’ James Harrison.

Cribbs was about to be tackled by LaMarr Woodley before Harrison slammed into the left side of Cribbs’ helmet.

Lions lose two

Detroit Lions linebacker Zack Follett was hospitalized after a violent helmet-to-helmet hit with a Giants player while covering a kickoff return.

The Lions said Follett was conscious and had full movement in his limbs.

Detroit also lost starting quarterback Shaun Hill in the loss to the New York Giants. He broke his left arm late in the first half.

Ryans’ season over

Texans All-Pro middle linebacker DeMeco Ryans will miss the rest of the season after tearing his left Achilles’ tendon just before halftime of Houston’s 35-31 win over the Kansas City Chiefs.

Ryans jumped and fell to the turf on a touchdown by the Chiefs. He remained on the turf for a few minutes while trainers attended to him before being helped to the cart.

Gates to have MRI

San Diego Chargers tight end Antonio Gates left the loss to the St. Louis Rams with a left ankle injury.

He will undergo an X-ray and an MRI today in San Diego.

Gates left in the second quarter. He came back on the field for a series before he was taken to the locker room late in the first half.

Vick not on sideline

Michael Vick was not late, and he was not supposed to be on the sideline for the Philadelphia Eagles.

The Eagles said Vick had permission to show up late and he was intentionally kept off the field.

The Green Bay Packers have acquired safety Anthony Smith in a trade with the Jacksonville Jaguars for a conditional seventh-round draft pick, a person with knowledge of the deal told the Associated Press.