A big smile broke across Christopher Morel’s face. Morel had just finished batting practice Friday afternoon on a humid workout day at London Stadium before the Chicago Cubs’ two-game weekend series against the St. Louis Cardinals. “From what I can tell, the ball flies out of here,” Morel said through an interpreter. London Stadium, home to Premier League’s West Ham United, originally was built and created for the track and field events at the 2012 Olympics.