The San Francisco 49ers' offensive line is struggling, and those struggles aren't going to get any easier after a trio of injuries cropped up in the team's Week 16 loss to the Miami Dolphins. Head coach Kyle Shanahan on Monday in a conference call with

In his second game back from a torn left Achilles, San Francisco 49ers linebacker Dre Greenlaw was again unable to finish all four quarters on Sunday afternoon. More than a week after De'Vondre Campbell declined to go into the game for an injured Greenlaw and was subsequently suspended for the final three games for conduct detrimental to the team,