Complex sentence: Listed at odds of 22--1 that day, he came out of the gate slow and was sixth early, but going into the turn he took an awkward step, was pulled up, and taken off the track in a horse ambulance.
Split into simpler sentences: Listed at odds of 22--1, he was slow out of the gate slow and was sixth early on. He was pulled up after taking an awkward step going into the turn, and taken off the track in a horse ambulance.