What time does Usain Bolt run the 4x100-meter relay Friday night?

If you take Usain Bolt at his word, the Jamaican superstar will likely run his last Olympic race Friday night as he competes in the 4x100-meter relay.

Bolt, who has won two gold medals already – for the 100-meter sprint and the 200-meter sprint – has said that the 2016 Rio Olympics is his last.