Fenway Park concession and restaurant workers went on strike Friday just as the Boston Red Sox open a highly anticipated weekend series against the world champion Los Angeles Dodgers.The union representing Aramark workers at Fenway Park and MGM Music Hall hit the picket line at noon after failing to reach a deal on a new contract.

The Aramark workers inside Fenway Park officially went on strike Friday afternoon. They were picketing around the ballpark throughout the day. They want a pay raise and protection from automation, like self-checkouts. “Hey, guys, if you can support our cause, please buy everything outside, okay?” one of the protesting workers said directly to fans.

Concession workers at Boston’s Fenway Park and nearby MGM Music Hall have begun a strike, with no last-minute deal reached in their negotiations with Aramark.