MIAMI GARDENS, Fla. -- There was a lot of hype and hoopla surrounding the Miami Dolphins' new-look offense this offseason.

First-year offensive coordinator Bill Lazor, who came from the Chip Kelly school of offense, was expected to bring an innovative style to Miami that was up-tempo and able to quickly put points on the board. Even Dolphins head coach Joe Philbin said in training camp that he viewed 25 points per game -- or 400 points in a season -- as a successful bar for his team.

But after three games, the Dolphins’ new offense is mostly firing blanks. As a result, Miami (1-2) suffered a 34-15 blowout loss at home to the previously winless Kansas City Chiefs (1-2).

The Dolphins have averaged just 12.5 points per game in the past two weeks. The "new look" is showing some of the same old mistakes that were made previously under former offensive coordinator Mike Sherman.

Many people in Miami have their jobs on the line this season, and the Dolphins can't win many games with the offense unable to consistently move the football.

Why is the offense struggling? There are myriad reasons. Here are a few worth noting:

• Dolphins quarterback Ryan Tannehill is not making the proper strides in Year 3. Lazor is asking a lot of Tannehill, and so far he’s proving to be unable to carry the team. Tannehill currently has a career-low completion percentage of 56.5 percent in three games. His passer rating of 74.1 also is a career low. The Dolphins can only go as far as Tannehill can lead them, and so far it’s not looking promising. "It's still early in the season, so I have confidence that we can get this thing turned around," Tannehill said. "But it has to happen now. I said that last week and we didn't get it done."

• There have been questionable play calling by Lazor and poor clock management by Philbin. On Sunday, the Dolphins called passes on second-and-1 and third-and-1 early in the fourth quarter, which resulted in an incomplete deep pass to Mike Wallace and a quarterback sack. Miami had the running game going -- Lamar Miller rushed for 108 yards -- and went away from it at a curious time. The game went downhill from there.

• The offense has been unable to sustain scoring drives. The Dolphins' longest touchdown drive was for 19 yards, which followed a Chiefs turnover. In fact, 12 of Miami's 15 points were set up by the defense and special teams. Defensive tackle Jared Odrick forced a fumble on Kansas City quarterback Alex Smith to set up a short touchdown. Miami's defense also got a safety and rookie Jarvis Landry returned a kick 75 yards to set up a field goal.

• The Dolphins had three drops in the first quarter, which killed any momentum in the first half.

• Pass protection, which was the offense's biggest issue last season, remains a problem. The Dolphins allowed four quarterback sacks for the second week in a row. Tannehill has been sacked nine times in three games.

There are no easy fixes. Leaks are springing up in various areas and Philbin said "everything" is on the table in terms of making improvements.

The good news is Miami will play another winless team, the Oakland Raiders. The game will be played in London, where the Dolphins hope to find their identity.

"We have to determine what we're going to do," Philbin said. "We have to go back to work. We gotta go across the Atlantic Ocean and we have to play better."