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An early Koufax biographer (George Vecsey of the New York Times) noted that, on the Dodgers' flight out of San Francisco following that series, Roseboro was on the plane playing cards with Jim Gilliam (the coach who came out of retirement to play 118 games at third base in 1965 and the Series) and Don Drysdale...wearing a San Francisco Giants' cap. Apparently, according to Vecsey, Willie Mays gave him his cap because his own was caked following the incident.

Allen Barra in Clearing the Bases noted a kind of subtext to the Roseboro-Marichal incident: Both men were under ferocious stress having nothing to do with competitive professional baseball. Roseboro had been shaken up by the Watts riots that had recently happened, while Marichal - known as a very fervent Dominican patriot - was wracked over his homeland's civil war (getting rid of Trujillo) and worried about his cousin, also named Juan Marichal, who was the running mate of Marichal's preferred Presidential candidate (they won the contest in due course) and whose campaign was bringing trouble from the usual gang of idiots. Barra suggests, not implausibly, that two men under such stress might have been too strung out to be playing in a tight pennant race, especially against each other considering the backdrop of the longtime Dodger-Giant rivalry.

Knowing Roseboro and Marichal both to be gamers, I'm not sure I'd have wanted to be the one to suggest that to either man. An interesting post-script: Marichal in due course was named the Dominican Republic's minister of sports.