The New York Jets' multifaceted offense has the full attention of 49ers defensive coordinator Vic Fangio.
When the 49ers slogged onto the rain-soaked field at Youngstown State University, they were working on ways to contain Mark Sanchez and the Jets' regular offense while remaining aware of the challenge that backup Tim Tebow may present.
Having linebacker Patrick Willis healthy will help. Willis, hurt in the 24-13 loss to Minnesota on Sunday, said his right ankle ''feels good.''
Meanwhile, the 49ers' offense will be looking for a way to score against Jets coach Rex Ryan's defense.