Yellen, who has been committed to ASU since June, will compete for a starting spot at quarterback this upcoming season, and he will arrive on campus as an early enrollee in the Spring.
The pro-style passer should pose an interesting dynamic as a signal-caller, as he plays the position with a different style compared to the likes of Daniels, who is one of the top dual-threat quarterbacks in the country.
According to 247Sports, Yellen is the 41st best recruit in the state of California, and he is the 12th best pro-style quarterback coming out of Mission Viejo High School.
The Under Armour All-American was recruited by offensive coordinator Rob Likens, and during his senior season at Mission Viejo, he threw for over 3,000 yards of offense while accumulating 27 touchdowns and just three interceptions.
The year prior in his junior season, Yellen threw for 2,439 yards in 12 games.
Among a list of schools, Yellen was recruited by Georgia, Oregon State and Washington State.