Colonels, as an example, if it were a fifty percent field goal percentage and there were no other influencing factors (Changes in offensive sets, defensive sets, ratings gains, plus minus settings, etcetera) then out of 100 games the two teams played the team with the 50% average would be expected to get between 55 and 45% 68 times
To get between 40 and 60% 95 out of the hundred times.
But note that, statistically, five out of a hundred times you are STILL going to get something more extreme than that. . .even BEFORE you start accounting for settings and external factors, because the game is NOT a perfect probabilistic distribution and has those external factors.
(I just happen to like statistics. Weakness of mine)
So while unlikely, its not radically impossible.