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.
  The hamstrings (posterior thigh muscles) are made up of 3 long muscles that start at the bottom of your pelvis extending down the back of your thigh and along either side of your knee, to your shin bones.here are three main muscles of the posterior compartment of the thigh. They are the biceps Femoris, the semitendinosus and the semimembranosus. Together, they cause flexion â¦ of the knee and extension of the hip. 7 people found this useful.