Should McCray pass through waivers unclaimed, he would revert to the team’s injured reserve list on Saturday.
The Raiders placed Melifonwu on injured reserve coming out of the preseason while he was working his way back from knee surgery and designed him to return a few weeks ago.
Oakland still has one more designation to return to use this season.
Melifonwu, 23, was selected by the Raiders with the No. 56 overall pick. According to OverTheCap.com, Melifonwu will receive a four-year contract worth $4,509,376, which includes a signing bonus of $1,419,544.
During his four-year college career at Connecticut, Melifonwu recorded 349 total tackles, 11 tackles for loss, eight interceptions, 16 pass defenses, two fumble recoveries, and two forced fumble.