Updated with Scout.com info.
Twitter has come to life with the Dartmouth commitment of wide receiver Joseph Cook, Bishop Amat HS, La Puente, Calif. He's 6-foot-5 or 6-4 or 6-3 and 185ish, depending on which service you believe.
Rivals shows commitment and has him at 6-4, 185, for what it is worth.
Scout.com background story here
Hudl page and video highlights