Top QB recruit KJ Costello picks Stanford over USC, Michigan

Stanford got a major boost for its football program on Thursday when top 2015 quarterback prospect KJ Costello committed to them.

Costello made the announcement at his school and also on Twitter:

It's been an unbelievable journey. I am proud to announce that I will be playing football at Stanford University #nerdnation #StanU

— kj costello (@kj_costello) March 26, 2015

Costello, who is finishing his junior year at Santa Margarita (same school as Carson Palmer) in Calif., chose the Cardinal over USC and Michigan. He is rated as a four-star prospect by 247 recruiting and is considered to be one of the top pocket passers in his graduating class.

Stanford recruiting analyst Andy Drukarev says Costello is one of the highest-rated players the Cardinal have received a commitment from in the past 15 years:

KCostello is the 3rd highest ranked player in 15-yr history of @Rivals rankings to pick #Stanford, behind only Trent Edwards, Kyle Murphy.

— Andy Drukarev (@StanfordRivals) March 26, 2015

Photo: KJ Costello/Twitter