MLB

Union probes Jay Z over Cano gift

A gift to Yankee free agent Robinson Cano has left Jay Z facing a lot more than “99 Problems” with the Major League Baseball Players Association.

Only five months after Jay Z became a sports agent, the players union is probing whether the rap mogul violated its rules by giving the superstar a $34,000 watch for his 31st birthday during a recent bash in Belgium, sources told The Post.

The five-time All-Star — the biggest name in the off-season free-agent class — received the limited-edition Classic Fusion Shawn Carter watch by Hublot during an Oct. 22 party.

The union’s regulations prohibit agents from offering “any money, or any other thing of value” to players to help sway them to become clients. Agents, however, can dish out gifts to players who are already clients, but they must disclose to the union in writing any gifts valued at more than $500.

Sources said Jay Z could be subject to disciplinary action if he’s found in violation, but “it is not expected to be severe.”

A rep for Jay Z declined to comment.

In June, the Brooklyn native announced that he had snatched Cano from super-agent Scott Boras and that his new company, Roc Nation Sports, would rep the second baseman, who stands to score one of baseball’s richest contracts.