Race Comment Explainer

Original comment with matches highlighted:

wore red hood to post, mid-division, pushed along over 3f out, went 4th 2f out,

Matched phrases & meanings

Phrase	Meaning
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Mid-division	Running in the middle of the pack.
Plugged on	Kept going without showing much pace.
One pace	The horse maintained its speed but could not accelerate or quicken.

Summary

The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Running in the middle of the pack.
Kept going without showing much pace.
The horse maintained its speed but could not accelerate or quicken.