San Antonio Independent School District agreed Monday to negotiate the sale of a key plot of land needed to construct a new stadium for the San Antonio Missions baseball team, potentially clearing one of the project's final hurdles. SAISD's board voted to begin discussions with the Missions' ownership group, Designated Bidders LLC, and real-estate developer Weston Urban to sell 2.3 acres of land needed for the downtown arena. The property is now used as a parking lot for Fox Tech High School.