Race Comment Explainer

Original comment with matches highlighted:

tracked leader, led after 4th, turn, weake and headed , before 2 out

Matched phrases & meanings

Phrase	Meaning
Tracked leader	Followed closely behind the leaders.
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
home turn	This is the final bend or corner of the track, just before the horses enter the final straight run to the finish line.
Weakened	The horse lost speed and dropped back through the field.

Summary

Followed closely behind the leaders.
The jockey started to urge the horse (hand-riding, not necessarily using the whip).
This is the final bend or corner of the track, just before the horses enter the final straight run to the finish line.
The horse lost speed and dropped back through the field.