YES Network.com

Major League Baseball is expanding its partnership with Apple's Passbook app. Passbook will enable MLB to provide paperless ticketing at 13 ballparks during the 2013 season.

As reported by Gigaom, MLB announced the expanded service at a fan event in New York on Tuesday. MLB was one of Apple's first partners when Passbook launched as part of iOS 6 in September. 

The teams accepting Passbook tickets for the first time in 2013 are the Minnesota Twins, Baltimore Orioles, Milwaukee Brewers, Oakland Athletics, Pittsburgh Pirates, Detroit Tigers and Chicago Cubs. The New York Mets, San Francisco Giants and Kansas City Royals began accepting Passbook tickets last season and will continue to do so in 2013. MLB also announced three more teams will begin offering Passbook tickets during the 2013 season but are not ready to make an official announcement. 

MLB officials noted that while Passbook is exclusive to iOS users, they are focused on expanding their services to the rapidly growing Android user community. The popular MLB At Bat app is also available on Android phones. 

Major League Baseball Advanced Media is the digital arm of the league and responsible for MLB.com, MLB.tv and the At Bat apps.

Follow Matt Hughes on Twitter: @hughesmatt