Strong, a redshirt junior, spent two seasons with the Sun Devils after transferring from Pierce College, a junior college program.
From the school's announcement:
"Jaelen's enormous impact was felt from the first day he stepped on the practice field with us more than 16 months ago," head coach Todd Graham said. "His work ethic, attention to detail and overall football IQ are just a few of his attributes that make him such a special talent.
"It has been a great pleasure to watch him grow into the young man he has become - a leader off the field and a giver in his community."
Strong was named a second team All-American by SI.com after recording 75 receptions for 1,062 yards and 10 touchdowns this season. His signature moment came when he caught a Hail Mary as time expired to give Arizona State a win over USC in October.
The Philadelphia native leaves Arizona State eighth in program history in career receiving yards with 2,184.
The Sun Devils are 9-3 this season and play Duke in the Sun Bowl on Saturday.
- Ben Estes