Major League Baseball will begin installing two new, experimental replay systems this month at Yankee Stadium and Citi Field in New York.
The systems will be used to test their viability for reviewing fair/foul calls during games.
They won't be used to reverse or confirm calls at this time, but installing the systems now will allow the powers that be to review their effectiveness.
"Hawkeye," the camera-based technology used in tennis, will be tested at Citi Field, both during Mets games in September and on off-days.
A radar-based system, similar to the technology used to track shots in golf telecasts, will be tested at Yankee Stadium.