WEDNESDAY: Kovacevic has details on the breakdown in communication between the Pirates and Plummer.  MLB.com's Jen Langosch has a statement from Huntington; here's the money quote:

"Miguel Sano has apparently agreed to terms with another organization without his agent engaging the Pirates in legitimate negotiations."

TUESDAY: Dejan Kovacevic of the Pittsburgh Post Gazette reports that the Twins will sign Dominican shortstop Miguel Angel Sano. Sano will receive a bonus of $3.15MM, the largest for an international amateur player given this summer. Sano's would be the second largest Latin American signing bonus ever behind only Dominican pitcher Michael Ynoa, who signed with the A's for $4.25MM last year, says Baseball America. It's the second largest in Twins history behind Joe Mauer's $5.15MM.

Last May, Kovacevic said Sano's bonus could reach $3MM. The deal will be signed tomorrow; however, Jorge Arangure of ESPN the Magazine adds via Twitter that "this deal isn't completed until Sano gets a visa to play in the U.S. And that's no given." While his age remains unconfirmed, Sano's saying he's 16.

The signing comes as a surprise. As many as 8-10 teams were reportedly interested in Sano, but it was the Pirates that had intensely pursued him. Kovacevic notes a breakdown between Sano's agent, Rob Plummer, and the Pirates:

"Plummer made clear that his relationship with the Pirates, particularly general manager Neal Huntington and Latin American scouting director Rene Gayo, became frayed during the process. The Pirates were the most aggressive team once the July 2 international signing period began, making offers of $2 million at the time and $2.6 million a month ago — the latter payment to be split in three parts — but talks were minimal in the past three weeks… each side expressed strong distrust in the other."

According to Kovacevic, Plummer says Huntington never believed other teams were interested in Sano and was overly concerned he was bidding against himself.

Tim Dierkes also contributed to this post.