Interesting soccer chance calculation.
Better chance winning with less players? What is that player do kick an own goal?!
Video
That's not weird at all.
If the player you remove from your active roster was going to get murdered by 2-3 opposing players due to the Weapon Triangle, then you've actually *gasp*
made your team stronger by removing the weakest link.
ie: opposing team is say, Attacker - Midfielder - Midfielder - Midfielder - Defender
and your initial 'randumb' team set-up is say, Attacker - Attacker - Midfielder - Midfielder - Defender
...now remove the Defender and your % should go up since he's weak vs. 3 opposing players, whereas the Attackers are only facing a single opposing Defender. (and thus, take a much smaller overall hit)
Yes player levels factor into it, but the biggest influence is going to be from the Weapon Triangle match-ups.