very cool. I've been collecting players' mugshots from mlb.com for the past couple years. It's a daunting task. Last year, I didn't download any pitcher pictures and I didn't get around to downloading about 8 teams.
Here's another behind the scenes photo at photo day. It's a little amusing:
http://news.yahoo.com/photo/070224/483/azer10402242035
The photo that you referenced has a caption, "Oakland Athletics' outfielder Mark Kotsay holds up a name card saying he won't smile during picture day at spring training baseball" (Yahoo tends to take their photos down after a few months).
It's funny how baseball attracts a range of personalities. I guess any sport does that too. But it's funny how this kotsay guy refuses to smile--even to the point of making a sign. I wonder if A) he's serious and just a grumpy guy B) he's really goofy and doing this in contrast to his personality to be funny C) He just has a dry sense of humor.
I never get those people with dry senses of humor. But they can be funny sometimes, i guess.