Auburn received a commitment Tuesday from a Monday.
Carver-Atlanta four-star safety Quindarious Monday committed to the Tigers Tuesday night following an unofficial visit.
Monday announced his decision on Twitter.
"This [has] been a tough process and a very hard decision," Monday wrote. "But after sitting down with my parents I am 100% committed to Auburn University."
Monday's commitment is the second for Auburn from a defensive player. The Tigers had racked up seven on offense and only one on defense - junior college defensive lineman Daquan Newkirk.
Monday chose Auburn over offers from several top programs, including Clemson, Alabama, Florida, Georgia, Michigan, Tennessee and South Carolina, among others.
Rivals ranks Monday, who stands 6-foot-3 and weighs 180 pounds, the No. 30 safety in the 2018 class and No. 28 overall player in Georgia.