shirk (work by pretending to be sick or incapacitated) v.i.: malinger

Players are regarded [by team owners] as overpaid louts who greedily want more than they deserve. … When a player is injured, he is suspected of malingering if he doesn’t return to action immediately — unless the bone is sticking through the meat. (Ron Mix, So Little Gain for the Pain; Striking NFL Players Deserve Much, Much More, Sports Illustrated, 10/19/1987, p. 54.)