Blue Jays-Orioles game Thursday moved to 12:05 p.m.
The decision, announced Wednesday, came after the Orioles monitored National Weather Service reports and consulted with the commissioner's office.
The series between Toronto and Baltimore has already been affected by rain. Tuesday's game was washed out and scheduled as part of a single-admission doubleheader on Wednesday.
Hurricane Joaquin could work its way up the East Coast in the next few days and is expected to bring heavy wind and flooding.