Commisioner Chris- Why enter a claiming race?

[engbloomj]

I am confused regarding the following entry:
Horse name Commissioner Chris
Entry
Activity date 01-23-2009
Track Aqueduct
Surface Inner track
Distance 1 Mile
Race number 1
Purse $23,000
Claim price $14,000
Individual claim price $14,000
Race type Claiming
Post position 3
Jockey Studart M

This horse appears to be paying its bills with good wins here and there. Why would they be putting him in such a low claiming race after recently winning? I am novice and just trying to figure things out.
Thanks John