Silver and Black Editors reports defensive tackle John Henderson has retired. He was recently cut by the Raiders after two seasons with the team. He has experienced several injuries recently.

Denver free-agent defensive lineman Derrick Harvey has signed with Cincinnati. He was a non-factor in Denver last season.

Oakland is still in on Cincinnati defensive end/linebacker Manny Lawson. But so is Green Bay and Indianapolis.

New York Giants defensive lineman Dave Tollefson visited Seattle. Oakland has shown interest in Tollefson, but finances may be an issue. Tollefson is a Bay Area native and former Oakland practice squader.

Cincinnati re-signed defensive tackle Pat Sims, winding down the market at the position even more. Denver badly needs a defensive tackle. It will probably draft one at No. 25 in next month’s draft.

UPDATE: Not so fast. The folks who reported the Henderson story said they made a mistake and Henderson is not retired. Translation: If someone offers a Henderson a deal he likes he probably will consider playing. Two years ago, when he signed with the Raiders, Henderson did so in June and this year could be a similar situation.

UPDATE II: I just talked to Henderson’s agent, Joel Segal. Here is what he had to say: “John is absolutely not retired.” So, there you go.