According to Scott LeDoux,

Scott fought Leon Spinks to a 10-Round Draw on October 22, 1977.

A few weeks later, Scott fought an exhibition with Champion - Muhammad Ali.

Scott LeDoux >
'In my opinion, they both 'stink'. Leon is not ready for 10-Rounders, and he's
too small.'

'On Ali. He's got nothing left. He's an over-stuffed doughboy. Duane Bobick
would destroy him if they fought. And Duane is only a slightly above-average
fighter. Ali is easy-pickings and will lose the next time he fights somebody
decent.'