Whose son was the worst? (opposite to 'best' thread')

[reggaereggae]

Someone posted an interesting, 'Whose son was the best' with regards to a top boxer's son going pro...

I think the other end is also of interest - I wonder whose son was the worst follow of their dad in the ring.
Some suggestions to get started (son first, dad second):

Ty Cobb - Tex Cobb
Roberto Duran Jnr - Roberto Duran
Peter McNeeley - Tom McNeeley

UK
Joe Bugner Jnr - Joe Bugner
Ross Minter (wasn't bad but not near Alan) - Alan Minter

and of course, the classic

Butterbean Jnr - Butterbean :-)

[TerribleTerry]

Marvis Frazer - Smokin Joe