USC coaches estimated they'd sign three to five receivers in the 2016 recruiting class.
With more than five months until signing day, they've reached the high end of that range.
Bishop Amat's Tyler Vaughns announced his commitment to reporters Wednesday, becoming the fifth receiver to join USC's 2016 recruiting class.
Vaughns, 6 feet 2 and 170 pounds, watched training camp practice last weekend and has made several unofficial visits to USC's campus in the last two years. He was also considering Alabama, Georgia and Washington.
Vaughns caught 83 passes for 1,183 yards and 12 touchdowns during the 2014 season.
Vaughns' high school teammate, receiver Trevon Sidney, announced his commitment to USC last month.
Receivers Velus Jones from Saraland, Ala., Josh Imatorbhebhe from North Gwinnett in Suwanee, Ga. and Michael Pittman from Westlake Village Oaks Christian also are committed.
USC has five scholarships remaining in the 2016 class.
Here's a look at who is committed to the Trojans:
Player, position, high school
Matt Fink, QB, Glendora
Velus Jones, WR, Saraland (Ala.)
Josh Imatorbhebhe, WR, Suwanee (Ga.) North Gwinnett
Michael Pittman, WR/DB, Westlake Village Oaks Christian
Trevon Sidney, WR, La Puente Bishop Amat
Tyler Vaughns, WR, La Puente Bishop Amat
Cary Angeline, TE, Exton (Pa.) Downingtown East
Frank Martin, OL, Santa Ana Mater Dei
Nathan Smith, OL, Mesa
Keanu Saleapaga, DL, La Mirada
Liam Jimmons, DL, Huntington Beach
Keyshon Camp, DL, Lakeland (Fla.) Lake Gibson Senior
Daelin Hayes, LB, Ann Arbor (Mich.) Skyline
Mique Juarez, LB, North Torrance
Jordan Iosefa, LB, Honolulu (Hawaii) St. Louis School
C.J. Pollard, DB, Gardena Serra