Gametime cortisone shots for players who play mask injuries, allow players to play, but they end up with more severe injuries by games end. Instead of 3 week healing time, you risk losing the player for the season as they just re-injure the problem repeatedly for that game. Sometimes this causes another injury requiring surgery.

Are the Seahawks so desperate at WR they're willing to risk permanent or season ending injury to Harvin just for this game? I seriously doubt it.

Again, all this could be decoy crap to mask other issues, but if Harvin got the shot, good luck to him. I got a cortisone shot 20 plus years ago allowing me to run on my knee. Had my knee been left alone, it would have healed correctly and I wouldn't still feel that injury now. Today my doctor still talks about the mistake my old doctor made all those years ago pumping me with cortisone because that knee acts up and still bothers me.