Is this guy a smurf?

Games Halo 5: Guardians
1

So the other day I was paired up against gamertag (Edit: Removed gamertag). When going through the ranking process for FFA I’ll often look up the players on waypoint to see what level of player they are. I know that I’m a mid to high diamond player that briefly made it to Onyx FFA and probably could again if I put in the time so this helps me understand who I’m playing against. I got paired up against him once or twice after this.

I thought this was odd so I looked into it a bit further. He played 9 games of FFA and then stopped, even so far as to quit the 10th game for a DNF to ensure he wouldn’t get a ranking. He won all 9 games btw against pretty good players.
Why would someone who’s clearly very skilled at halo do this? Does he get off on having a high KD? (who cares?!).
What does he do now? Wait until July’s season starts and repeat?
I believe this guy is a smurf, but I just don’t see the point.

Hoping people out there can help me understand!

Cheers

EDIT: removed gamertag as it’s been brought to my attention that it’s bad form. I wasn’t calling him out I was just trying to provide reference to my question. Thanks to those that let me know.

2

There’s plenty of these people out there. Intentionally staying low ranked so their buddies will get matched against low ranks in order to boost.

3

you’re not allowed to put the gamertag in, i believe

4

This will probably get locked soon but from the looks of it yes he is

5

Calling out ain’t allowed. Get rid of the name.

6

Strictly speaking there is nothing to say that you can’t play 9 qualifiers and then stop before you get ranked. That’s not what I would call sandbagging/smurfing. Sandbagging would be if he did all ten qualifiers by rubberbanding his controller and getting a really low ranking so he could then keep playing that playlist against weaker opponents.