The Phillies held their annual rookie hazing last night in Atlanta. Phillies infielder Freddy Galvis, who apparently skipped out of last year's picture, captured this year's picture and posted it to his Instagram account.
Galvis' caption reads, in English (my best, rough translation possible, with help of my friend):
Today we haze the 2013 Phillies rookies. I was saved from last year's picture, but not this year. Bet on the #13 horse and you will not lose!
I was not totally sure what they were until Galvis' horse reference. I guess they are jockeys. I do not know a lot of the slang in Galvis' Spanish, but that's a start. Judging by the picture, some of the others who escaped last year were not able to do so this year.