Red fly hack the ball through the blue defence and players from both teams chase it
blue 7 gets to ball first, tries to gather it but loses control, knocking the ball toward the blue line , (ie no knock on, play on)
Blue 9 was chasing behind Blue 7 , ie in front of his team mate who last played the ball .. he continues to chase the ball and he beats two chasing red players to the ball and gathers it
Q was Blue 9 offside ?