#6. Core 4
The Giants have looked very different over the years and from the castoffs to Hunter Pence and Angel Pagan to Andres Torres and Gregor Blanco, the team has continually brought in new faces. One of the constants has been the pitching staff, and specifically the bullpen. Javy Lopez, Jeremy Affeldt, Santiago Casilla and Sergio Romo have each won three World Series as a member of the Giants. While their roles have changed throughout the run, their effectiveness hasn’t.
In 2010, Brian Wilson was the closer, while the Core 4 were all used as setup men depending on the matchups.
In 2012, Sergio Romo was the closer, with the Affeldt, Casilla and Lopez each playing critical setup roles again.
In 2014, it was Santiago Casilla’s turn to pitch the 9th inning, but again, all four were lights out throughout the playoffs.
The value of Casilla, Romo, Affeldt and Lopez has been one of the most underrated elements of the Giants dynasty. That is why they deserve such a high-ranking. That is also why they are all still members of the best bullpen in baseball.