Minnesota Vikings wide receiver Rondale Moore suffered a "pretty significant" left knee injury while returning a punt during the second quarter of Saturday's preseason matchup vs. the Houston Texans,

Moore, who’s spent the past year working back from a right knee injury, appeared to injure his left leg on a punt return in the second quarter Saturday.

Key return man Rondale Moore suffers significant injury in preseason opener for Vikings and may be lost for long period