Skip first two grok pattern matches

I am trying to parse out the last number of a field (that is a string). My grok pattern, currently, pulls the first number and puts it in the new field. How can make that grok pattern skip the first 2 numbers it comes across and instead grab the third?

Sample [TEXT] field value:

" IAT1613 JOB SERZMFP (JOB04933) SYSTEM MESSAGE COUNT IS 290,000"

Here's my code:
</>
if "IAT1613" in [TEXT] {
grok { match => ["TEXT","%{NUMBER:MSG_COUNT}"] }
}
</>

The grok pattern grabs the "1613" but I need it to grab the number 290,000 instead.

Anchor the pattern to end of line. Also, NUMBER cannot contain commas, so use a custom pattern.

"(?<MSG_COUNT>[0-9,]+)$"