7:33pm: The Twins have also signed Dominican third baseman Roni Tapia for a $550K bonus, Wolfson tweets. Ben Badler of Baseball America writes that Tapia generates "easy power" but added that a position change is all but inevitable.
5:01pm: The Twins have signed Dominican outfielder Lewin Diaz, according to Darren Wolfson of 1500 ESPN (on Twitter). Diaz ranked as MLB.com's No. 10 international prospect in this year's class and was 15th on Baseball America's Top 30. According to MLB.com's Jesse Sanchez (on Twitter), Diaz signed for $1.4MM -- a significant chunk of the Twins' $3.9MM bonus pool.
The 16-year-old Diaz's frame reminds some scouts of Ryan Howard, and MLB.com praises his power and approach: "Overall, Diaz has notable raw power and one of the best rhythm and timing approaches among all hitters in the international market this year."
Wolfson also adds that the Twins like Cuban defector Dariel Alvarez, but he will likely be too expensive. Signing Alvarez wouldn't count against Minnesota's bonus pool, because he's over 23 years of age and has more than three years of experience. There is no restriction on how much teams could spent to sign him. It was reported last week that Alvarez is eligible to sign with any team as a free agent.