User blog comment:Xilinoc/Ch. 562 - THE VILLAIN 2 (Mask De Masculine is a Mexican luchador in a German army)/@comment-24297669-20131217215754/@comment-11051098-20131218233643

Jackie was a human with a degree of Hollow-inflicted powers. From what I could see in the anime, she wasn't near strong enough for Renji to need much power to defeat.

As for the first invasion, the shock of seeing Äs stealing Byakuya's Bankai, could have brought him out of it. And most important, when Äs used the Bankai so mercilessly against Byakuya, Renji was enraged and proceeded to release his own Bankai to go out on Äs, and Mask came back in that very moment, so sudden that Renji probably didn't have time to react.

And from the looks of it, he was knocked unconscious and taken out completely when Mask punched him half way across the Seireitei.