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Mailbag: Is there a Jim Harbaugh deadline?

Weekend mail call:

Anthony from Winchester, Virginia, wants to know if I think the San Francisco 49ers could trade either tight end Vernon Davis or guard Alex Boone if they continue their holdouts.

Bill Williamson: I think it's early for that, but it's an option for both players if their holdouts extend. If we get into the regular season and the 49ers feel like their offense is fine without either player, a trade is possible. But it is a last-resort situation.

John from Tucson wants to know if I think the 49ers could extend the contract of coach Jim Harbaugh by the start of training camp.

BW: It's possible, but I wouldn't count on it. I think we are headed to this being figured out after the season. I think Harbaugh is fine waiting. But that could create problems. We all know the Cleveland Browns called in January. Expect several more calls from other teams if we get to next January and Harbaugh enters the final 365 days of his contract. That could cause havoc with the organization. I think, ultimately, both sides want to get a deal done. But there could be continued rocky moments before an extension is finalized.

Bill from McKinney, Texas, wants to know if I think the 49ers could move Lawrence Okoye from defensive tackle to guard.

BW: It's possible, sure. First, the 49ers want to make sure Okoye gets used to being a football player. He has no previous experience, but he is so athletic. The reality is Okoye will first see action, if he makes the team, on special teams. If the 49ers think he can help on special teams, but could be better suited as an offensive player, I think they'd consider moving him. But for now, they will try to make it work on defense for Okoye.