Newly signed Boston Red Sox outfielder Rusney Castillo has successfully obtained his work visa from the U.S. government and is immediately eligible to play in games, according to Juan Perez, the president and CEO of Roc Nation Sports, which is representing the Cuban native.

The 27-year-old Castillo -- who on Saturday signed a seven-year, $72.5 million contract with the Red Sox, the largest contract ever granted an amateur -- arrived at the team's facility in Fort Myers, Florida, on Wednesday to begin workouts. He is scheduled to work out again Thursday morning.

Boston's rookie league affiliate in the Gulf Coast League ends its regular season with a game Thursday. As winners of the GCL's South Division, the Sox rookie entry has qualified for the playoffs: a one-game semifinal Friday, with the winners meeting in a best-of-three final beginning Saturday.

On Wednesday, according to Perez, Castillo was granted a P-1A work visa from the U.S. Citizenship and Immigration Services for "internationally recognized athletes." The process required paperwork (including proof of residency) from the player, as well as from the Red Sox (including the player contract). A P-1A visa is initially granted for a period of five years, renewable once for a second five-year period. As a holder of a P-1A visa, Castillo also will be able to apply for permanent residency in the U.S.

The issuing of the work visa is the final hurdle for Castillo, who left Cuba under undisclosed circumstances last winter (believed to be in December), established residency in Haiti, and came to the U.S. with his wife and 5-year-old daughter on June 25, the same day Jay Z and his wife Beyonce brought their "On the Run" tour to a sold-out Sun Life Stadium in Miami. Castillo spent his first night in the U.S. at the concert.

Shawn "Jay Z" Carter is the founder of the entertainment company Roc Nation, LLC; Roc Nation Sports is its sports management division, with Castillo joining Robinson Cano of the Mariners, CC Sabathia of the Yankees, Kevin Durant of the NBA's Oklahoma City Thunder, Celtics draftee James Young and the WNBA's Skylar Diggins among its first clients.