Race Comment Explainer

Original comment with matches highlighted:

always in rear, ridden before 3 out, ailed of before 2 out, soon

Matched phrases & meanings

Phrase	Meaning
ridden before	The jockey started urging the horse aggressively before the second-last obstacle to try and get it back into contention.
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.
Rear	Running near the back of the field.

Summary

The jockey started urging the horse aggressively before the second-last obstacle to try and get it back into contention.
A definitive statement that the horse was finished and effectively out of the race
Could not keep up with faster horses mid-race.
Running near the back of the field.