Sanjuan Wolf

[SSJ2]

How do you think he was initially even captured, and how powerful do you think he is?

 

[Captain Cadaver]

From the sheer fact he's a Level 6 prisoner, he's probably at least close to the other inmates on that level, so at bare minimum around Lucci tier, if not far higher based on him withstanding Sengoku's shockwave. He ought to be far stronger after the timeskip via scaling from Burgess and his gains.

As for how he was captured, maybe he can alter his body's size in a reverse manner to Wadatsumi increasing his.