Team was replacing power cable at shovel. 30' of cable was spooled off cable reel. Cable reel operator backed up and spooled more cable off reel. Unknown to operator cable had backlashed on reel. Cable was being reeled back onto reel. Cable tight-lined, movement of cable struck IE on left leg. 4/9/2014 a brace was prescribed to support leg, IE was placed on Light Duty.