Giants Roster & Staff
Transactions
| Date | Transaction |
| 06/28/18 | San Francisco Giants signed free agent RHP Garrett Christman to a minor league contract. |
| 06/28/18 | San Francisco Giants signed free agent RHP Cooper Casad to a minor league contract. |
| 06/23/18 | San Francisco Giants optioned LF Mac Williamson to Sacramento River Cats. |
| 06/23/18 | San Francisco Giants recalled Austin Slater from Sacramento River Cats. |
| 06/23/18 | San Francisco Giants sent RHP Johnny Cueto on a rehab assignment to Sacramento River Cats. |
| 06/21/18 | San Francisco Giants optioned 2B Kelby Tomlinson to Sacramento River Cats. |
| 06/21/18 | San Francisco Giants activated SS Brandon Crawford from the paternity list. |
| 06/21/18 | San Francisco Giants activated SS Brandon Crawford from the paternity list. |
| 06/21/18 | San Francisco Giants activated SS Brandon Crawford from the paternity list. |
| 06/19/18 | San Francisco Giants recalled Pierce Johnson from Sacramento River Cats. |
| 06/19/18 | San Francisco Giants placed RHP Hunter Strickland on the 10-day disabled list. Broken right hand. |
| 06/19/18 | San Francisco Giants placed RHP Hunter Strickland on the 10-day disabled list. Right hand fracture. |
| 06/18/18 | San Francisco Giants placed SS Brandon Crawford on the paternity list. |
| 06/18/18 | San Francisco Giants recalled Kelby Tomlinson from Sacramento River Cats. |
| 06/18/18 | San Francisco Giants signed free agent LHP JJ Santa Cruz to a minor league contract. |
| 06/17/18 | San Francisco Giants signed RHP Trenton Toplikar. |
| 06/17/18 | San Francisco Giants signed LHP Bryce Tucker. |
| 06/17/18 | San Francisco Giants signed OF George Bell. |
| 06/17/18 | San Francisco Giants signed RHP Jake Wong. |
| 06/17/18 | San Francisco Giants signed SS Edison Mora. |
| 06/17/18 | San Francisco Giants signed RHP Solomon Bates. |
| 06/17/18 | San Francisco Giants signed RHP Ben Madison. |
| 06/17/18 | San Francisco Giants signed RHP Alex DuBord. |
| 06/17/18 | San Francisco Giants signed 3B David Villar. |
| 06/17/18 | San Francisco Giants signed 3B Sean Roby. |
| 06/17/18 | San Francisco Giants signed RHP Trevor Horn. |
| 06/17/18 | San Francisco Giants signed RHP Chris Roberts. |
| 06/17/18 | San Francisco Giants signed OF Austin Edgette. |
| 06/17/18 | San Francisco Giants signed OF Randy Norris. |
| 06/17/18 | San Francisco Giants signed C Braden Frankfort. |
| 06/17/18 | San Francisco Giants signed RHP Ryan Walker. |
| 06/17/18 | San Francisco Giants signed OF Kwan Adkins. |
| 06/17/18 | San Francisco Giants signed SS Marcos Campos. |
| 06/17/18 | San Francisco Giants signed RHP Travis Perry. |
| 06/17/18 | San Francisco Giants signed C Fabian Pena. |
| 06/17/18 | San Francisco Giants signed RHP Preston White. |
| 06/17/18 | San Francisco Giants signed RHP Ben Strahm. |
| 06/17/18 | San Francisco Giants signed RHP Clay Helvey. |
| 06/17/18 | San Francisco Giants signed C Joey Bart. |
| 06/17/18 | San Francisco Giants signed RHP Sean Hjelle. |
| 06/17/18 | San Francisco Giants signed 3B Abdiel Layer. |
| 06/17/18 | San Francisco Giants signed RHP Matt Frisbee. |
| 06/17/18 | San Francisco Giants signed SS Jett Manning. |
| 06/17/18 | San Francisco Giants signed RHP Keaton Winn. |
| 06/17/18 | San Francisco Giants signed C Angel Guzman. |
| 06/17/18 | San Francisco Giants signed OF Patrick Hilson. |
| 06/17/18 | San Francisco Giants signed RHP Blake Rivera. |
| 06/16/18 | San Francisco Giants activated 1B Brandon Belt from the 10-day disabled list. |
| 06/16/18 | San Francisco Giants optioned RHP Pierce Johnson to Sacramento River Cats. |
| 06/15/18 | San Francisco Giants recalled Pierce Johnson from Sacramento River Cats. |
| 06/15/18 | San Francisco Giants placed 3B Evan Longoria on the 10-day disabled list. Left hand fracture |
| 06/15/18 | San Francisco Giants sent RHP Jeff Samardzija on a rehab assignment to Sacramento River Cats. |
| 06/14/18 | San Francisco Giants signed free agent RHP Jose Valdez to a minor league contract. |
| 06/12/18 | San Francisco Giants signed free agent RHP Mack Meyer to a minor league contract. |
| 06/12/18 | San Francisco Giants signed free agent RHP Jordan Scott to a minor league contract. |
| 06/12/18 | San Francisco Giants signed free agent OF Tyler Flores to a minor league contract. |
| 06/11/18 | San Francisco Giants signed free agent LHP Yhonson Rojas to a minor league contract. |
| 06/10/18 | San Francisco Giants signed free agent C Trevor Brown to a minor league contract. |
| 06/08/18 | San Francisco Giants signed free agent CF Gregor Blanco to a minor league contract. |
| 06/05/18 | San Francisco Giants sent CF Gregor Blanco outright to Sacramento River Cats. |
| 06/05/18 | San Francisco Giants optioned RHP Pierce Johnson to Sacramento River Cats. |
| 06/05/18 | San Francisco Giants activated LHP Madison Bumgarner from the 60-day injured list. |
| 06/04/18 | Baltimore Orioles claimed LHP D.J. Snelten off waivers from San Francisco Giants. |
| 06/03/18 | San Francisco Giants sent RHP Jose Valdez outright to Sacramento River Cats. |
| 06/02/18 | San Francisco Giants designated CF Gregor Blanco for assignment. |
| 06/02/18 | San Francisco Giants activated 2B Alen Hanson from the 10-day injured list. |
| 06/02/18 | San Francisco Giants activated LF Hunter Pence from the 10-day disabled list. |
| 06/02/18 | San Francisco Giants placed 1B Brandon Belt on the 10-day disabled list. Appendicitis. |
| 06/01/18 | San Francisco Giants optioned 2B Kelby Tomlinson to Sacramento River Cats. |
| 06/01/18 | San Francisco Giants activated RHP Mark Melancon from the 60-day injured list. |
| 06/01/18 | San Francisco Giants designated RHP Jose Valdez for assignment. |
| 06/01/18 | San Francisco Giants activated 2B Joe Panik from the 10-day disabled list. |