LOS ANGELES >> Dorian Thompson-Robinson greeted every reporter at UCLA’s Wasserman Football Center with a hello and a handshake, very much the host welcoming guests to his home.

Which, well, yeah.

Thompson-Robinson — or “DTR,” as he doesn’t mind being called — is from Las Vegas. But he’s grown up in Westwood.

From cub to man, the now-22-year-old quarterback is embarking on his fifth season as Bruin, back on campus for the start of training camp on Friday because he opted – against Coach Chip Kelly’s advice,