Matchup: 49ers (2-1) at Jets (2-1) 49ers' Offensive Line vs. Jets' Defensive Line The Jets will never be able to replace cornerback Darrelle Revis. But if they are going to minimize the effect of his season-ending knee injury, it starts at the line of scrimmage. To ease the burden on their diminished secondary, the Jets must find a way on first and second downs to stop a San Francisco rushing attack that averages 5.4 yards a carry. Mark Sanchez's completion percentage, lowest in the N.F.L. among the 32 qualifying quarterbacks. His position coach, Matt Cavanaugh, said recently that in the off-season, he told Sanchez about his accuracy: "I really don't care. I want you to win. The Jets won in Miami with Sanchez completing 46.7 percent of his 45 passes, but it is unreasonable to expect similar success if such imprecision continues. Any time they served Mexican food at Baltimore for one of our meals, it was known as Rex-ican, not Mexican, because he loved Mexican food. Vic Fangio, the 49ers' defensive coordinator, when asked to share memories of his three seasons working in Baltimore with Rex Ryan.