Rusney Castillo has successfully obtained his work visa from the U.S. government and is immediately eligible to play in games, according to his representation.

The Boston Red Sox signed Castillo to a seven-year, $72.5 million contract on Saturday. It is the largest contract ever granted to an amateur.

He arrived at the team's facility in Fort Myers, Florida, on Wednesday to begin workouts and is scheduled to work out again Thursday morning.