An instant replay system currently being considered by Major League Baseball would reportedly have home run calls analyzed at a central location in New York City, according to MLB.com. MLB is considering adopting the system by the end of the season, the league's official website reported on Saturday, citing unnamed sources. But officials stressed that the system must satisfy everyone from the umpires to the players to Commissioner Bud Selig before it's implemented. "It's all still premature," MLB spokesman Rich Levin said on Friday. "A final decision has not been made."