Alvarez (elbow) threw a scoreless inning in a rookie league game Monday.
Alvarez (elbow) said Wednesday that he expects to throw off a flat mound by the end of January, Roch Kubatko of MASN Sports reports.
Alvarez (elbow) underwent successful Tommy John surgery Tuesday, Jon Heyman of FanRag Sports reports.
Alvarez (elbow) agreed to a minor-league deal with the Orioles on Tuesday, Rich Dubroff of Press Box Online reports.
Alvarez (elbow) was released by the Orioles on Thursday.
Alvarez underwent an MRI due to elbow soreness and Tommy John surgery is expected, MASN's Roch Kubatko reports.
Alvarez has been asked by the Orioles if he'd be willing to switch from an outfielder to a pitcher, Rich Dubroff of MLB.com reports.
Alvarez will get a chance this spring to earn an outfield reserve spot on the 25-man roster, Steve Gardner of USA Today Sports reports.
Alvarez was optioned to Triple-A Norfolk following Monday's win against the Rockies, Jon Meoli of the Baltimore Sun reports.
Alvarez was recalled from Triple-A Norfolk on Friday.