Teaford, recalled from Triple-A Omaha on Thursday, still will be on standby as the bullpen long man on Friday and Saturday nights, manager Ned Yost said.
"He's a probable [starter]," Yost said before Friday night's Interleague opener. "If I have to use him tonight and tomorrow, he won't pitch Sunday, I'll tell you that."
In three starts for Omaha, Teaford was 2-0 with a 1.06 ERA.
"I pitched well down there and got more consistent," Teaford said. "I was throwing more strikes, so hopefully it'll translate to here."