Aoki’s trade means expanded role for Fisher

To Astros general manager Jeff Luhnow, Derek Fisher is here to stay. The Astros traded outfielders Norichika Aoki and Teoscar Hernandez to Toronto for bullpen support in Francisco Liriano, providing yet another opportunity for Fisher, the Astros’ No. 4 prospect, who has made the most of his time in the Majors this season.