No, it appears to me that both sides took prisoners over a period of a few days or so. He went on to a Union prison while his command too some Yankee prisoners.

I believe his unit roster is that found here:

July 21, General [J.G.]George reported that a detachment from Col. McGuirk's Regiment had cut the railroad and taken 15 prisoners near Germantown.

https://www.custermen.com/DixieBoys/Miss3Cav.htm