Chas McCormick home run leads Astros to walk-off win over Aroldis Chapman and Rangers

Aroldis Chapman, now with the Rangers, faced his former team the Astros and gave up a home run to Chas McCormick.
The Rangers acquired Chapman to strengthen their bullpen as they challenge the Astros in the AL West.
Chapman had been pitching well for the Rangers before this outing against his former team.
The Astros have dealt with injuries but their offense, led by the hot-hitting McCormick, has still been productive.
McCormick's clutch home run gave the Astros a walk-off win over their division rivals.