I would bet most people who go to Tigers games either don't know you can look up lineups before the game, or don't care enough to bother to. I think a lot of people coming to the game just assume Miggy is going to be in the game. Lots of people, maybe most people, who show up at Comerica over the course of a season are casual fans who go to only one or two games a year, not diehards who go to dozens. They probably don't watch them regularly on TV, don't listen to games on radio, or read any beat stories or columns about them, so they may not even know Miggy doesn't actually play every game. So it might be less about "let's look online to see if Miggy is playing, if he's not then forget it", and more like "this is Miggy's last year, we should go see him play before he retires!" If that's the case, then a general announcement that Miggy is not playing for the rest of the season, and by extension never play for the Tigers ever again, will probably keep a lot of those people home.