"It's pretty hard for us to determine who's a significant player is and who's not one," Harbaugh said. "I don't know how to do that. It's one of the ways they write it in there. They say, 'a significant player who has not missed any time should be on there.' Well, in my mind, all 53 players are significant. I think every single guy is significant, so I'm not about to start saying, 'Well, one guy is more significant than the other' 11.