Former All-Star Jake Arrieta held a masterclass with a group of East London school children and explained what it takes to make it in MLB at BaseballSoftballUK's First Pitch Festival. The Chicago Cubs became a World Series champion in 2016, but that did not stop him from showing the next generation of Brits how to hit a home run on Hopkins' Field in the Queen Elizabeth Olympic Park. Ad Nine hundred children from twenty-five different schools enjoyed a masterclass from MLB legends Arrieta and David Eckstein, as well as Chicago Cubs mascot Clarke the Cub.