By Michael Fabiano Stiff competition in Washington’s backfield will challenge Antonio Gibson borderline RB1 status. The summer is here, meaning we’re getting closer to the start of fantasy football drafts. Success in those drafts will come from landing terrific bargains in the middle to late rounds while avoiding players who could see their numbers decline compared to 2021. That latter exercise isn’t easy, however, especially in the case of players who are among the elite at their position or are coming off breakout seasons in the stat sheets. Case in point: In 2020, David Montgomery emerged i…