The Cardinals signed running backs Alfred Morris and Zach Zenner this morning. The signings were first reported by Adam Caplan of ESPN.com and have since been confirmed by the team. In the team’s press release, the organization announced they released cornerback Trevor Williams to accommodate the signings.

Morris, in his ninth NFL season, burst onto the scene as a rookie in 2012 with Washington rushing for over 1,600 yards. He started every Washington game (64) over his time with the organization and accrued 5,078 yards from scrimmage in his four seasons with the team. Morris has not been a primary back elsewhere, but he has been a spot starter for both the Cowboys and 49ers in the past two seasons.

Zenner is another multi-year veteran, but has never had more than a rotational role. After spending the first four seasons of his career with the Lions, Zenner was released in August. He joined the Saints on October 16th and only received one carry before he was released yesterday.

Adding two veteran backs raises concerns that star running back David Johnson will be out for the Cardinals upcoming games. Johnson has been limited by knee problems over the past week and while he was active against the Giants, it was clear the team wanted to limit his workload. Backup Chase Edmonds was exceptional filling in as the primary back and appears Morris and Zenner will be expected to spell Edmonds in the coming weeks while they wait for Johnson to heal.

Williams was claimed on waivers from the Chargers on October 8th. He hasn’t played a large role for Arizona this season, but over the previous three seasons between San Diego and Los Angeles, Williams made 27 starts accruing 100 tackles and three interceptions.