What role the tight end has in Kliff Kingsbury's offense is yet to be seen, but the Cardinals won't have a potential starter at the position when practice begins in training camp next week.

Veteran Charles Clay, dealing with a knee issue, was one of six players the Cards placed on the physically unable to perform list Saturday. Also going on PUP: Defensive lineman Robert Nkemdiche (knee), offensive lineman Max Garcia (knee), linebacker Brooks Reed (hip), cornerback Brandon Williams (back) and linebacker Dante Booker (knee).

The team also signed defensive lineman Sterling Bailey, who has spent time with the Colts, Seahawks, Vikings, Buccaneers and Panthers since coming into the league in 2016. The Cardinals released offensive lineman Will Holden and rookie defensive lineman Immanuel Turner.

The Cards report to camp July 24 and hold their first practice July 25. They currently have two open spots on the 90-man roster, and after cutting Holden following the release of Desmond Harrison earlier this week, the team needs depth at offensive tackle.

The PUP players are eligible to return at any point in camp but cannot participate in any on-field team work until they come off the list. Clay has been considered a potential starter, especially given his versatile skills and receiving abilities. He was signed after Buffalo released him in February. Reed was also a February signee after the Falcons cut him.