Alex Rodriguez's former brother-in-law filed a $100-million suit in Miami state court Wednesday alleging, among other charges, breach of contract and fraud over multiple business ventures with the Yankees' designated hitter.

The suit, which was obtained by Newsday and first reported by the Daily News, was filed by attorneys for Constantine Scurtis, the younger brother of Cynthia Rodriguez, who was divorced from Alex Rodriguez in 2008.

The suit, originally filed last January, was amended to include additional claims. The action alleges that Scurtis did not receive his share of the proceeds when Rodriguez no longer wanted to partner with him after the divorce. Limited partnership ventures between the two were said to have sprung from Rodriguez's Newport Property Ventures.

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Rodriguez is accused in court papers of breach of contract, breach of fiduciary duty, fraud, civil conspiracy, unjust enrichment and tortious interference. Scurtis is seeking an injunction barring Rodriguez from transferring assets from the partnerships until the case is adjudicated.

Scurtis referred questions to his attorneys, Vincent Duffy and Joel Denaro, who did not return calls. Rodriguez's attorney, John C. Lukacs, did not respond to a call.

After reviewing the filing, Mineola attorney Anthony Sabino said, "The essence of it is very simple. This is what lawyers and judges call a business divorce. Oftentimes business divorces follow a marital divorce. That familiar pattern is repeated here once again. Alex and Constantine engaged in many, many complicated and convoluted real estate deals and Constantine says, 'I'm owed a piece of them and I want money from Alex.' "

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On another claim, unless proved otherwise in court, Sabino said Scurtis is accountable to the state of Florida and the federal government for a tax lien on funds Scurtis said were owed but never paid by Rodriguez.

He thinks the suit eventually will be settled without a trial.

"This is a very pedestrian business divorce case," he said. "I think it will be resolved in the typical way, a lot of jousting, discovery preliminary steps, but at the end of the day, this is never going to see a courtroom. This will be resolved out of court for X amount of money."