American football player fakes injury

NBC's Cris Collinsworth caught on immediately, saying that Sanders had "an injury ... of sorts. ... All I know is, Emmanuel Sanders was in the huddle, he's not looking like he's in too much pain now, and then, 'Oh, boy — here comes the cramp!' He goes down, and they don't have to burn the timeout. That is a savvy play, let's call it that, on the part of the Pittsburgh Steelers." One play later, Sanders -- miracle of miracles! — was able to return to the field.
This is to the American Liveleakers who keep saying faking injuries is only pulled out in European football. It seems that faking injuries to stop the clock is a fairly frequent occurrence in the NFL.