Help with my MLB Walk Up Song Blog?

I am a huge Baseball fan & would like to be a Sports Writer when I grow up. I also love music, and have always taken great interest in what songs MLB Players use as their walk up songs. I am going to write a blog critiquing all players' walk up songs, based on their personality, where they are from, etc & my plan is to email all 30 teams to get the song lists. My question is this: Who should I email to get the list from? To start, I searched through the Oakland A's front office and narrowed it down to 4 possible people, here they are: Senior Director of In-Stadium Entertainment, Director of Multimedia Services, In-Stadium Entertainment Manager, and Multimedia Services Coordinator. Who should I email? Thank you in advance for your help.