Pitcher Matt Cain has that number now, but it has been worn by many players since the team began playing in San Francisco in 1958. Among them: Moises Alou, Brian Johnson, Duane Kuiper, Bill Madlock, Don Larsen, Mike Benjamin, Jalal Leach, Russ Davis, Bob Farley, Kim Batiste, Bob Bathe, Francisco Melindez, Guy Sularz, Chris Bourjos, Greg Johnston, Damaso Blanco, Russ Gibson, Dave Marshall and Bill Sorrell.
Bill Rigney, who managed the Giants twice in San Francisco (1958-60; 1976), also wore 18, as did coach Joe Lefebvre.
Jake Dunning wore No. 51 with the San Francisco Giants.
Sergio Romo wore No. 54 for the San Francisco Giants.
Pitcher Manny Aybar wore No. 64 during the 2002 season.
Adam Duvall wore No. 37 when he played with the San Francisco Giants during the 2014 season.
Jeremy Affeldt wore No. 41 during his career with the San Francisco Giants (2009-2015)..
Jake Dunning wore No. 51 with the San Francisco Giants.
Santiago Casilla wore No. 46 for the San Francisco Giants.
Sergio Romo wore No. 54 for the San Francisco Giants.
Juan Gutierrez wore No. 57 for the 2014 San Francisco Giants.
Juan Perez wore No. 2 for the San Francisco Giants from 2013 to 2015.
Jim Clack
Ryan Vogelsong wore No. 32 with the San Francisco Giants. In previous years with the team, he wore the numbers 51 and 14.
Brandon Hicks wore No. 14 as a member of the 2014 San Francisco Giants.
Joaquin Arias wore No. 13 for the San Francisco Giants from 2012 to 2015.
Pitcher Manny Aybar wore No. 64 during the 2002 season.
Adam Duvall wore No. 37 when he played with the San Francisco Giants during the 2014 season.
Hector Sanchez wore No. 29 when he played for the San Francisco Giants from 2011 to 2015.