The NFL authorized players to wear Guardian Caps during games this season in an effort to reduce head injuries.

Brian Robinson Jr. will miss at least the Washington Commanders' first four games of the NFL season after being shot during at attempted robbery last weekend.

The Washington Commanders are preparing to start the NFL season without Brian Robinson Jr. after the rookie running back was shot in his right leg in an attempted robbery Sunday.

The mushroom-like padding players are wearing on their helmets during training camps this summer are called Guardian Caps.

(AP Photo/Aaron Doster)Dallas running back Ezekiel Elliott is inactive against San Francisco with a calf injury the two-time rushing championship has been battling for several weeks. Safety Deon Bush (foot) is also out after being listed questionable with Johnson. Cowboys: RB Ezekiel Elliott, QB Ben DiNucci, WR Malik Turner, CB Rashard Robinson, DE Bradlee Anae, LB Luke Gifford, DE Ron’Dell Carter. ___JACKSONVILLE AT BALTIMOREJaguars: CB Sidney Jones, CB Luq Barcoo, LB Quincy Williams, DT Daniel Ross, QB Jake Luton. Ravens: DE Calais Campbell, CB Jimmy Smith, CB Marcus Peters, RB Mark Ingram, LB Kristian Welch, DE Jihad Ward, C Trystan Colon-Castillo.

(Copyright 2019 The Associated Press. All rights reserved.) ALLEN PARK, Mich. The Detroit Lions have signed running back Jonathan Williams, adding depth in the backfield behind Kerryon Johnson and rookie D'Andre Swift. Detroit released running back Wes Hills on Monday to clear a spot on the roster. Williams has 329 yards rushing on 79 carries with two touchdowns over parts of three seasons with the Indianapolis Colts, New Orleans Saints and Buffalo Bills.