The first number they have retired is the number 12 in  1984, which represents the 12th Man, the aâ¦mazing fans of the  Seattle Seahawks who year in and year out cause the most false  start penalties in the NFL at Qwest Field and in the Kingdome, and  for their short two year time in Huskies Stadium.
The hamstring group comprises three muscles and their tendons, which originate on the ischial tuberosity (the part of the hip you sit on), flow down the back of the thigh and attach to the front and back of the knee. Like all muscles, the hamstrings are tethered by tendons, in this case to the hip and knee bones.
Hamstrings. Three muscles called the semitendinosus, semimembranosus and biceps femoris make up your hamstrings. These muscles run along the back of your thighs and are easily injured or strained. They run from your pelvis to the back of your knees and together work to stabilize the hip joint. The hamstrings are the primary muscles that perform hip extension during normal walking. In addition to hip extension, the hamstrings also bend your knees. These muscles propel your body forward and increase your walking speed.