A day after the Jaguars signed two running backs to improve their banged-up backfield, coach Doug Marrone ruled out running back Leonard Fournette for Sunday's game at Dallas.
Marrone on Wednesday also declared cornerback D.J. Hayden (toe) and left tackle Josh Wells (groin) out for the game and said former reserve Josh Walker is in line to make his first NFL start at left tackle against the Cowboys.
Fournette will miss his fourth game of the season because of a right hamstring injury he originally suffered during the second quarter of the team's season opener Sept. 9. He started and played less than a half against the New York Jets in Week 4 before coming out of the game.
It's unclear when Fournette will be available again, and the Jaguars made a series of moves Tuesday to address the position. They signed veteran Jamaal Charles and rookie David Williams and released tailback Brandon Wilds.
T.J. Yeldon is expected to remain the team's starting running back until Fournette returns.
"Jamaal, he looked good, he looked in shape, looked like he was ready to go [during his workout Tuesday]," Marrone said. "We'll see him out on the practice field [Wednesday]. With David, same thing. A good downhill runner, had 10 catches during the preseason. ... We just need some help and we got those guys in here."
Hayden will miss his fourth straight game, and Wells will be out after suffering an injury during the first half of Sunday's game at Kansas City.
Walker was inactive during the first two games of the season and did not play the following two games. He played 53 snaps Sunday.
Phillip Heilman: (904) 359-4063