Orioles manager Buck Showalter said either T.J. McFarland or Jake Arrieta will start on Thursday in Toronto.
T.J. McFarland pitched two scoreless innings of relief on Sunday night against the Yankees.
Rule 5 pick T.J. McFarland has won a spot on the Orioles' Opening Day roster.
Rule 5 pick T.J. McFarland struck out six in four perfect innings of relief Friday against Manatee Community College.
Orioles manager Buck Showalter said Rule 5 pick T.J. McFarland stood out among those that threw bullpen sessions Wednesday.
Orioles executive vice president Dan Duquette indicated Friday that Rule 5 selection T.J. McFarland will head to spring training with a chance to compete for a spot in the team's rotation.
Orioles selected LHP T.J. McFarland from the Indians with the 23rd pick in Thursday's Rule 5 Draft.