Detroit Lions General Manager Matt Millen should resign, the National Football League team's vice chairman said today.

The Lions fell to 0-3 yesterday after a 31-13 loss to the San Francisco 49ers.

"I think he should leave," William Clay Ford Jr. told reporters after a news conference. Ford, 51 and also chairman of Ford Motor Co., said he didn't have the authority to fire Millen.

Lions spokesman Matt Barnhart didn't immediately return a telephone call seeking comment.

Ford's father, William Clay Ford, 83, has owned the team since 1964.