"We obviously need someone to pitch in the doubleheader," Sveum said. "We'll probably look at that here in the next couple days, somebody's got to be here the 30th.
"But like I said, the plan or whatever, that's up to [president of baseball operations] Theo [Epstein] and [general manager] Jed [Hoyer]."
Arrieta had a 7.23 ERA in five starts with Baltimore but has shown some improvement in Triple-A Iowa with a 5.17 ERA in four starts (15 2/3 innings).
Ian McCue is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.