Race Comment Explainer

Original comment with matches highlighted:

mid-division, stumbled 3rd, r 4 out, tai and after 4 out,

Matched phrases & meanings

Phrase	Meaning
Mid-division	Running in the middle of the pack.
Towards rear	Running near the back of the field.
tailed off	A definitive statement that the horse was finished and effectively out of the race
Outpaced	Could not keep up with faster horses mid-race.

Summary

Running in the middle of the pack.
Running near the back of the field.
A definitive statement that the horse was finished and effectively out of the race
Could not keep up with faster horses mid-race.