Race Comment Explainer

Original comment with matches highlighted:

rear mid-division, slow jump 5th and in , up before 12th,

Matched phrases & meanings

Phrase	Meaning
Mid-division	Running in the middle of the pack.
tailed off	A definitive statement that the horse was finished and effectively out of the race
pulled up	The jockey stopped the horse from continuing
Rear	Running near the back of the field.

Summary

Running in the middle of the pack.
A definitive statement that the horse was finished and effectively out of the race
The jockey stopped the horse from continuing
Running near the back of the field.