Race Comment Explainer

Original comment with matches highlighted:

chased leaders, ng turn, b 4 out, ke 2 out and turn, bad mistake 2 out and

Matched phrases & meanings

Phrase	Meaning
Chased leaders	Running directly behind the horses in front of the field.
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
not fluent	The horse jumped the tenth fence/hurdle poorly or awkwardly
Weakened	The horse lost speed and dropped back through the field.

Summary

Running directly behind the horses in front of the field.
The jockey started to urge the horse (hand-riding, not necessarily using the whip).
The horse jumped the tenth fence/hurdle poorly or awkwardly
The horse lost speed and dropped back through the field.