A weekly look at what the Miami Dolphins must fix:

The Miami Dolphins have a lot of issues. But one silent killer has been dropped passes by wide receivers and tight ends, and it needs to stop immediately when Miami (1-2) travels to London to play the winless Oakland Raiders (0-3).

According to Pro Football Focus research, the Dolphins are second in the NFL with 11 drops after three games. Only the Baltimore Ravens (12) have more dropped passes. Miami had three drops in Sunday's 34-15 loss to the Kansas City Chiefs.

Dolphins starting quarterback Ryan Tannehill needs all the help he can get. He's on the hot seat and struggling with his accuracy (56.5 completion percentage) early in the season. On Sunday, Tannehill threw the ball well in the first half, but tight end Charles Clay and receivers Brian Hartline and Jarvis Landry all failed to bring in receptions that could have moved the chains early and potentially put points on the board.

Miami’s sloppiness on offense early led to a 14-3 halftime deficit against Kansas City, and the Dolphins weren’t able to overcome in the second half. The best solution is for receivers and tight ends to continue to do extra work during and after practice catching the football. It’s a group-wide issue -- not just one or two players -- so lineup changes wouldn't work.