The Blue Jays have voided the contract of Luis Castro after the Venezuelan shortstop did not pass his physical, according to a source familiar with the contract.

Castro, 16, had agreed to terms with the Blue Jays for $800,000 when the international signing period opened July 2 and had ranked as the No. 9 international prospect. Since the contract was never finalized, Castro will not receive his bonus and will become a free agent.

Castro, who trains with Jose Aguiar, is 6-foot-1, 190 pounds and impressed scouts with his righthanded bat, including his performances at international competitions. Several teams expected he would end up at another position, likely either third base or second.

While the Blue Jays had exceeded their $2.9 million international bonus pool for the 2012-13 signing period, that's now no longer the case. The Blue Jays also signed Venezuelan shortstop Franklin Barreto, the top international prospect, for $1.45 million, as well as Dominican shortstop Richard Urena, the No. 13 international prospect, for $725,000.