Sanders, the son of NFL Hall of Famer Deion Sanders, is the No. 8-ranked pocket-passer QB and the No. 41-ranked prospect overall in the class.
The 6-foot-2, 200-pound quarterback out of Trinity Christian School in Cedar Hill, Texas, is the first ESPN 300 recruit to choose FAU since ESPN started its rankings in 2009.
"I wanted to write my own legacy, FAU gave me a opportunity to do that! I trust the staff," Shedeur Sanders told ESPN's Gerry Hamilton in a text message. "[Owls coach] Willie Taggart was the first coach to offer me a opportunity to play at the next level."
As a junior last season, Sanders threw for 3,477 yards, 47 touchdowns and four interceptions. He had 3,088 yards, 42 touchdowns and seven interceptions his sophomore season and has had his father as his offensive coordinator.
Taggart signed his son, dual-threat quarterback Willie Taggart Jr., in the 2020 class after the program did not sign a quarterback in 2019. FAU signed three-star quarterback Cordel Littlejohn in 2018 and has starter Chris Robison on the roster for potentially two more seasons.
The coach is entering his first season in charge of Florida Atlantic after two losing seasons at Florida State.
After adding Sanders to the class, FAU has 18 total commitments, with Sanders as the only four-star.