Three defeats from three outings for the Yaks in week one of the summer tournament.
Deeping proved too strong for a Yaxley side wilting in the heat and from having played two matches already on the night.
Having been punished by speedy wingers on in the previous two matches, it was power and running ability through the centres that decided this one.
The match saw the end of Dan Lockes summer season when an awkward fall in goal left him with a twisted knee.