Joey Gerber graduated from Wayzata High School in Plymouth, Minnesota in 2015. He went undrafted in the 2015 Major League Baseball draft out of high school and enrolled at the University of Illinois where he played college baseball for the Fighting Illini.
As a freshman at Illinois in 2016, Gerber pitched only six innings, compiling a 7.50 ERA. In 2017, his sophomore season, he went 2–1 with a 4.36 ERA in 33 relief innings pitched, striking out 43.
In 2018, as a junior, he went 1–1 with a 3.14 ERA in 28+2⁄3 relief innings along with compiling 14 saves, tying the Illinois single-season record, earning a spot on the All-Big Ten Third Team.
After his junior year, Gerber was selected by the Seattle Mariners in the eighth round of the 2018 Major League Baseball draft. Gerber signed with Seattle and made his professional debut with the Everett AquaSox of the Class A Short Season Northwest League before being promoted to the Clinton LumberKings of the Class A Midwest League in July.
In 23+2⁄3 relief innings between the two clubs, he went 1–0 with a 2.10 ERA and 43 strikeouts. Gerber began the 2019 season with the Modesto Nuts of the Class A-Advanced California League, earning All-Star honors.
He was promoted to the Arkansas Travelers of the Class AA Texas League in June and finished the season there. Over 48+2⁄3 relief innings pitched between the two clubs, Gerber went 1–4 with a 2.59 ERA, striking out 69 and compiling a .215 batting average against.
There are no details about whether he has children or not. He may be may or may not have children. There are also no rumors about his children.