The Eagles officially signed running back LeGarrette Blount to a one-year contract Thursday morning.

That meant someone had to go.

To make room for Blount on the 90-man roster, the Eagles waived undrafted defensive tackle Charles Walker with an injury designation (knee).

Walker, from Oklahoma, was once thought to be a possible first-round pick but ended up going undrafted in this year's draft. He had multiple concussions in college and left his team midway through his 2016 season. Then, Walker revealed about a month before the draft, that he has been dealing with depression.

Walker participated in the team's rookie minicamp last weekend, but won't get to see OTAs, when they start May 23.

Blount, who joins the team on a one-year contract, will speak to reporters at 3 p.m. on Thursday.