Coming late to this to share an anecdote.
In Sep of 1971, when I was living in PA, my dad took my brother and me down to Philly to take in a DH at the Vet (what a horrible venue). The Phillies' Rick Wise was up against Bob Gibson for Game 1. That was the first and only time I saw Gibson pitch. He was 35 that year but still threw 20 complete games in 31 starts.
In any case, when Brock came up in the top of the 4th, Manny Muniz, who had replaced Wise after 2 innings, threw a ball up under Brock's chin. Down went Brock. Pitches 2 and 3 were deja vu. Brock casually walks out about a third of the way to the mound and wags the bat at Muniz while obviously saying something. Muniz remained on the mound...I couldn't make out whether he was engaging in some verbicuffs (yes, that's a new internet word). McCarver walked out and got between Muniz and Brock and, after a few words directed toward Muniz, started walking back to the plate. As he passed him, Brock must have said something because next thing you know McCarver throws a wicked right that lands square on Brock's chin. Down he goes. Benches empty, but no real damage is done to either side. McCarver gets ejected. Brock walks on the next pitch and promptly steals second. He went on to steal 3 additional bases that day.
McCarver had been charged earlier with an error on dropped pop foul. What I didn't know until I read
this was that apparently the Cardinals dugout rode McCarver near continuously afterward and reportedly got under his skin. So McCarver was probably still fuming a bit, and Brock had already stolen a base against him in the 3rd.