I've seen those numbers, though I only count 9 for Perez. Wonjongkam only became "the man" in 2010, so in terms of lineal/linear defenses, he only has 4. Canto's number seem right, however.
I counted every fight of Perez that was fought below the weight limit. Pong was the man long before that mate. Ignore Ring, look at Canto he lost to Park who lost......... who lost to Pong.
