I've looked around a bit and couldn't find anything from Sims about Marvin's passing nor any updated info on himself. Can anybody respond with an update on Robbie?
http://donstradley.blogspot.com/2021/05/whats-it-like-for-rockin-robbie-now.html Here is a bit of something from 2021
He had a nice run. Sounds like he was all too happy to let Marvin be the "Great One" rather than try for his own mark but we all have our thing.
It’s ain’t never easy why you’re boxing at the same time as your brother an he’s p4p one of the best boxers in the world an a future atg and you know that you’re nowhere near the level that he is but some people still expect you to be a special fighter like your brother