Reggie Bush rushed for 172 yards and two touchdowns against the Oakland Raiders in Week 2, leading the Miami Dolphins to their sole victory of the young season, 35-13.
And the running game is all that will save the Dolphins against the Arizona Cardinals' fierce defense on Sunday.
Bush has become a leader for the 1-2 Dolphins this season. He insists he'll play on Sunday, but his status is still up in the air after suffering a knee injury last week against the New York Jets, according to the South Florida Sun Sentinel.
The seven-year pro had a career year last season with Miami, racking up over 1,000 yards and six touchdowns on the ground while adding nearly 300 yards and a touchdown through the air. He already has 302 rushing yards and two touchdowns this season.
The Cardinals have one of the most frightening pass defenses in the league right now. They are allowing just 5.9 yards per attempt (third-best in the NFL) and have notched 12 sacks, tied for second in the league with the Green Bay Packers.
Arizona has done this despite being matched up against the New England Patriots and Philadelphia Eagles, who they held to a combined 19 points. They sacked Michael Vick five times while hitting him 13 times last week in their 27-6 victory. That was after they sacked Tom Brady four times and hit him six times in their 20-18 victory in Week 2.
Dolphins rookie quarterback Ryan Tannehill has completed less than 53 percent of his passes while averaging 6.03 yards per attempt and tossing one touchdown to four interceptions this season. Miami ranks 28th in completion percentage, 30th in yards per attempt, last in passing touchdowns and is tied for sixth in interceptions.
That is why it is critical that Bush makes the field on Sunday. The Dolphins don't have a shot if he is forced to miss the game.
The Cardinals have a scary pass defense, but they have allowed 4.0 yards-per-carry this season, 15th in the NFL. That's not bad, but it's not great, either.
With Bush, the Dolphins would have a much better chance of scoring an upset against Arizona. Without him, there isn't much hope.
When you lose your rock in the middle, things can fall apart quickly.