Holstein, a 6-foot-3, 215-pound quarterback out of Zachary High School in Zachary, Louisiana, is No. 59 on the ESPN 300.
Holstein originally committed to Fisher and Texas A&M in June 2021 but decommitted from the Aggies in March.
While Arch Manning remains the top uncommitted quarterback in the 300 (No. 1), Holstein was the third-ranked available signal-caller prior to committing to Alabama.