McFarland was optioned to Triple-A Norfolk on Sunday, Rich Dubroff of CSN Baltimore reports. The demotion has more to do with the Orioles needing a fresh arm than it does McFarland's performance. The lefty was used in three of the last four games and was presumably unavailable Sunday, prompting the Orioles to purchase the contract of Chaz Roe from Triple-A Norfolk in a corresponding move.