Maitan reported to rookie-level Orem last week and has appeared in five game, recording nine hits and a 2:2 BB:K over 20 at-bats.
Maitan is opening the season in extended spring training, MLB.com's Jonathan Mayo reports.
Maitan agreed to a contract with the Angels on Tuesday, Buster Olney of ESPN reports.
Maitan will be eligible to sign with other MLB teams beginning in two weeks, Jon Morosi of MLB Network reports.
Maitan will be declared a free agent by MLB as part of the Braves' punishment for illegal dealings in the international free agent market, Jon Heyman of FanRagSports.com reports.
Maitan could be declared a free agent upon the conclusion of MLB's investigation into improprieties regarding his signing in 2016, Jeff Passan of Yahoo Sports reports.
Maitan went 1-for-1 with a walk in his first professional game Monday with the GCL Braves.