Major League Baseball's investigation into the age of Cuban shortstop Aledmys Diaz is still ongoing, according to multiple sources.

Diaz, who is represented by Jaime Torres, has been presenting himself as a 23-year-old born on Jan. 8, 1990, which would make him exempt from the international bonus pools. However, Baseball America reported last month that there were multiple sources that listed Diaz with a different date of birth from his time in Cuba.

A December 2007 story on the website of Cuba's top league referred to him being born Aug. 1, 1990, which would make him 22 and match several stories from Cuban media outlets in July 2012 that referred to him as 21 when news surfaced that he had left Cuba. Another roster from the 2010 Pan-American games says that Diaz was born in 1991, although the roster only provides the year and no specific date of birth. A third roster from Haarlem Baseball Week in the Netherlands last July lists Diaz with an Aug. 1, 1991 date of birth, which would make him 21.

Diaz has already submitted official documentation to MLB with his Jan. 8, 1990 date of birth and used that date to obtain permanent Mexican residency papers, according to Torres. Now MLB must determine Diaz's true age, whether he's subject to the international bonus pools and whether he's going to face any penalties for potentially submitting false information to the league about his age.