USC and California have both picked up recruiting commitments.
Blackwell (6-foot-1, 190) is the top receiver for touted quarterback Matt Wittek, who previously committed to the Trojans. Blackwell picked USC over California, Florida State, Notre Dame, Oregon State, Tennessee, UCLA and Washington.
He's the fourth 2011 pledge for the Trojans, all coming from the ESPNU 150 Watch List. He caught 52 passes for 1,044 yards (20.1 average) and 11 touchdowns as a junior.
Cal got word Tuesday from quarterback Kyle Boehm (San Jose, Calif./Archbishop Mitty). He picked the Bears over Arizona State, Colorado State, Illinois, Oregon State, San Jose State, Texas Tech, Kansas State, Northwestern and Washington, among others.
Boehm told ESPN.com's Greg Biggins, "I knew I was getting close to making my decision and didn't feel the need to drag it out any longer. Cal has everything I could want in a school, and has a great combination of athletics and academics. The fact that it's close to home and my family can come up and see my games is another added bonus."
Boehm passed for 881 yards and seven touchdowns while also rushing for 861 yards and 12 more scores last year.