Race Comment Explainer

Original comment with matches highlighted:

tracked leader, t, kept on u well over 1f out, until inside last

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).
Weakened	The horse lost speed and dropped back through the field.
Kept on	The horse maintained its speed well to the finish.

Summary

Followed closely behind the leaders.
The jockey started to urge the horse (hand-riding, not necessarily using the whip).
The horse lost speed and dropped back through the field.
The horse maintained its speed well to the finish.