Much like the Yankees and Red Sox, the Giants and Dodgers share a long-lasting legacy of bad blood. OK, the blood is downright awful.
One of the more famous incidents took place way back in 1965, in an August game that saw Giants pitcher Juan Marichal take a bat to the Dodgers' John Roseboro.
Here's a snippet from Leonard Koppett's New York Times article at the time:
In a burst of uncontrollable temper under circumstances still unclear, Juan Marichal of the San Francisco Giants attacked John Roseboro of the Los Angeles Dodgers today with a baseball bat. Marichal's bat hit Roseboro on the top of the head at least twice and opened a two-inch cut that bled profusely.
Eventually, those circumstances became a bit clearer.
CBS Sports' Dayn Perry recounted the event in December, noting that Marichal previously threw at Maury Wills and Ron Fairly. Wanting some retaliation, Roseboro asked Sandy Koufax to return the favor to Marichal.
Koufax's attempt wasn't good enough for Roseboro, who decided to toss back the ball to Koufax, throwing close to Marichal's head.
Perry writes, "Roseboro rifled it back to his pitcher and in doing so came perilously -- and intentionally -- close to striking Marichal in the head."
And that's how brawls start.