david_garrard2_web.jpgMIAMI — Miami Dolphins quarterback David Garrard will undergo arthroscopic knee surgery that is expected to sideline him for two to four weeks, his agent Al Irby said

The recovery timetable likely takes Garrard out of the competition to win the starting job for the season opener in four weeks.

Garrard's knee had been sore for a few days and, following an examination, he decided to undergo surgery rather than deal with the issue throughout the season, his agent said. The decision came as Garrard was about to make his Dolphins debut in their exhibition opener last Friday night against Tampa Bay, which the Dolphins lost.

For now, Garrard's injury narrows the competition for the starting job down to holdover Matt Moore and first-round draft pick Ryan Tannehill.

Photo: David Garrard