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7/2/2014 9:12 A.M. ET

Twins lock up pitching prospect Ynoa

The Twins signed 16-year-old highly-regarded pitching prospect Huascar Ynoa for $800,000, according to an industry source.

The club did not confirm the signing.

Ynoa, who ranks No. 17 on MLB.com's Top 30 International Prospects list, is one of the most interesting prospects available on the international market this year.

The younger brother of A's Minor Leaguer Michael Ynoa, Huascar has one of the best arms on the market, but he frustrated observers at times with his inconsistency on the mound.

Here's what's certain -- Ynoa's fastball hovers in the low 90s and was recently clocked at 94 mph, and he also throws a cut fastball at around 90-91 mph. The teenager's repertoire also includes a splitter, curveball and a changeup -- the pitch some scouts believe is his best secondary pitch.

The right-handed pitcher is expected to improve with experience because he is still growing and learning how to harness and repeat his delivery. Based in Puerto Plata, Dominican Republic, Ynoa is trained by Edgar Mercedes.

In accordance with the Collective Bargaining Agreement, each team is allotted a $700,000 base and a bonus pool based on the team's record in 2013 for the international signing period, which started Wednesday. Minnesota's bonus pool total for this year's signing period is $3,686,600.

Jesse Sanchez is a national reporter for MLB.com. Follow him on Twitter @JesseSanchezMLB. This story was not subject to the approval of Major League Baseball or its clubs.