OAKLAND, Calif. -- Coaches from the Oakland Athletics were sent scrambling after toilets in the home clubhouse backed up and overflowed before Saturday's exhibition game against the San Francisco Giants.

It was the latest in a series of plumbing problems that have plagued the aging stadium, which was built in the late 1960s.

There were multiple problems last year alone.

In September, A's players reported foul smells from the bathroom end of their dugout. That came after a clogged pipe caused a sewage backup and flooding on the bottom floor of the ballpark in June, sending the Seattle Mariners and A's scrambling around in towels and heading for higher ground in the Oakland Raiders' locker room.

Outfielder Josh Reddick tweeted about the latest problems Saturday.

Back in Oakland? Sewage problems in clubhouse!! Yep. We are BACK BABAY! - Josh Reddick (@joshreddick16) March 29, 2014

Saturday's game eventually was canceled because of rain.

A steady downpour forced a delay of more than an hour, and the grounds crew covered the infield with a silver tarp before officials decided to call off the game, sending home a crowd that was expected to be near 30,000.

Information from the Associated Press was used in this report.