Don't know how many truly believed they were SB frontrunners.
They certainly fell under the category of trendy pick. They are a run-first team with the best running back duo in the league, with arguably the best offensive line in the league as well. But Mayfield is limited, and they're not great at WR besides Landry (who is not an awesome #1)
Like PF said, could be a dangerous team if they're healthy at the right time. Have a feeling Mayfield isn't gonna be healthy for the rest of the season though