Complex sentence: In 2009, a new system called Zone Evaluation was implemented in all 30 Major League ballparks, replacing the QuesTec system; the new system records the ball's position in flight more than 20 times before it reaches home plate.
Split into simpler sentences: In 2009, a new system called Zone Evaluation was implemented in all 30 Major League ballparks replacing the QuesTec system. The new system records the ball's position in flight more than 20 times before it reaches home plate.