Here's a team-by-team breakdown of the 2015 recruiting classes in the Pac-12.
1. USC Trojans
National rank: 3
Coach Steve Sarkisian's first full class is impressive, as more than half are in the ESPN 300. The Trojans proved they could close as well with five-star corner Iman Marshall and Serra teammates John Houston Jr, the No. 1 ILB, and Rasheem Green, the No. 8 DT, announcing on signing day. They also have commitments from two of the nation's best quarterbacks, No. 115 Sam Darnold and No. 124 Ricky Town, who flipped from Alabama. The Trojans added ESPN 300 RB Ronald Jones II at the Under Armour Game. Protecting those future QBs will be No. 21 Chuma Edoga and three-star Roy Hemsley. Future USC pass-catchers are junior college prospects Isaac Whitney and De'Quan Hampton and ESPN 300 tight end Tyler Petite, who flipped from Duke. On defense, No. 141 Jacob Daniel is a key pledge on the interior, and Noah Jefferson (No. 287) is full of upside at tackle. ESPN 300 inside linebacker Cameron Smith (No. 300) is a run-stuffer, and was joined in January by No. 77 Osa Masina. No. 137 Isaiah Langley is one of the top cover corners in the country. The Trojans added No. 99 Marvell Tell and No. 286 Ykili Ross on Jan. 4. Porter Gustin was a big get just prior to signing day. He has the physical tools to be a presence off the edge.