User blog comment:Xilinoc/Ch. 669 - 刃 II/@comment-117598-20160413133908/@comment-3423279-20160413164010

We may be looking at different lines but I see one that says this.

"and is the only person in the history of the Gotei 13 who became a captain without being able to perform Bankai."

He didn't know Bankai upon becoming a Captain, so this is still correct.