Was this a very fake-looking fight, where they just grabbed each other's clothing and acted 'tough'? Any other DS roles?
That was a big mistake they made, ending the marriage on Rhoda. TV execs' big theory for a couple years in the mid-70s was that if your show is successful, change it immediately before viewers get tired of it. They ruined quite a few shows that way, probably.
He sounds like a better actor than the roles he got. Ron Silver and Rene Auberjonois were regulars on Rhoda too, and I know they were better than those nothing roles, even though it started out as a good show. Worked with K Hepburn?