Miami Dolphins quarterback David Garrard told FoxSports.com on Friday that he will miss two to four weeks after having arthroscopic knee surgery on Saturday. "Nothing happened, just Father Time, wear and tear," Garrard said. "They have to take out loose things floating around." The report did not indicate which knee will be operated on. Garrard, who missed all of last season with a back injury, signed with the Dolphins for one year and $3.5 million in March. The former Jacksonville Jaguar is competing with Matt Moore and Ryan Tannehill for the starting quarterback job.