![35 under 35: The story behind how minor-league manager Mark Hallberg already has changed Giants history - The Athletic 35 under 35: The story behind how minor-league manager Mark Hallberg already has changed Giants history - The Athletic](https://cdn.theathletic.com/app/uploads/2019/08/22092339/PV9D7343.jpg)
35 under 35: The story behind how minor-league manager Mark Hallberg already has changed Giants history - The Athletic
Third Base Coach Mark Hallberg of the San Francisco Giants poses for... Photo d'actualité - Getty Images
![May 21 2022 San Francisco CA, U.S.A. San Francisco second baseman Wilmer Flores (41) celebrates his home run with third base coach Mark Hallberg (91) during MLB game between the San Diego May 21 2022 San Francisco CA, U.S.A. San Francisco second baseman Wilmer Flores (41) celebrates his home run with third base coach Mark Hallberg (91) during MLB game between the San Diego](https://c8.alamy.com/comp/2J99WMM/may-21-2022-san-francisco-ca-usa-san-francisco-second-baseman-wilmer-flores-41-celebrates-his-home-run-with-third-base-coach-mark-hallberg-91-during-mlb-game-between-the-san-diego-padres-and-the-san-francisco-giants-the-padres-beat-the-giants-2-1-at-oracle-park-san-francisco-calif-thurman-james-csmsipa-usacredit-image-thurman-jamescal-sport-mediasipa-usa-2J99WMM.jpg)
May 21 2022 San Francisco CA, U.S.A. San Francisco second baseman Wilmer Flores (41) celebrates his home run with third base coach Mark Hallberg (91) during MLB game between the San Diego
![MARK HALLBERG ARIZONA DIAMONDBACKS INFIELDER FLIPS Editorial Stock Photo - Stock Image | Shutterstock | Shutterstock Editorial MARK HALLBERG ARIZONA DIAMONDBACKS INFIELDER FLIPS Editorial Stock Photo - Stock Image | Shutterstock | Shutterstock Editorial](https://editorial01.shutterstock.com/preview-440/6336660u/531cee81/Shutterstock_6336660u.jpg)
MARK HALLBERG ARIZONA DIAMONDBACKS INFIELDER FLIPS Editorial Stock Photo - Stock Image | Shutterstock | Shutterstock Editorial
![SFGiants on Twitter: "Happy Birthday to Assistant Coach Mark Hallberg! 🎈 #SFGiants https://t.co/4yCJmuHB6C" / Twitter SFGiants on Twitter: "Happy Birthday to Assistant Coach Mark Hallberg! 🎈 #SFGiants https://t.co/4yCJmuHB6C" / Twitter](https://pbs.twimg.com/media/Eowuy3qVgAAykY4.jpg:large)
SFGiants on Twitter: "Happy Birthday to Assistant Coach Mark Hallberg! 🎈 #SFGiants https://t.co/4yCJmuHB6C" / Twitter
![35 under 35: The story behind how minor-league manager Mark Hallberg already has changed Giants history - The Athletic 35 under 35: The story behind how minor-league manager Mark Hallberg already has changed Giants history - The Athletic](https://cdn.theathletic.com/app/uploads/2019/08/22172942/2019_06_14_15_55_42_3019.jpg)