Major League Baseball will begin installing two new, experimental replay systems this month at Yankee Stadium and Citi Field in New York to test their viability for reviewing fair/foul calls.

The systems won't be used to reverse or confirm calls at this time, according to MLB officials familiar with the plans. But their installation will enable MLB to determine which system would best fit baseball's needs.

"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. That technology, officials said, has not been used previously to review calls in any sport.

Baseball also plans to test both systems during the Arizona Fall League and present the results in November at the next owners' meetings.

There is no timetable for making a decision on when, or even whether, to begin using one of the two systems to review calls in major league games, officials said. However, commissioner Bud Selig has said he hopes to expand replay to include fair/foul calls and possibly trap/catch calls as soon as next season.

The use of traditional replay to review calls beyond home runs remains an option, but MLB appears to be leaning toward using more precise technology, as long as that technology proves to be quick and accurate enough to work in baseball.