Johnny Holton does n't seem to be in position to surpass Roberts , but a good training camp and preseason could alter the depth chart .
The Raiders need a pass - catcher to push Seth Roberts for the No. 3 spot .
Johnny Holton does n't seem to be in position to surpass Seth Roberts , but a good training camp and preseason could alter the depth chart .
The Raiders need a pass - catcher to push Seth Roberts for the No. 3 spot .