Dr. Tezla's team is made up of Lani Tam, Brian Kadeem, GIG the robot, and Dr. Tezla himself. Dr. Tezla's team mainly stays in the Acceledrome to help the drivers who are racing, but sometimes Lani or Dr. Tezla will drive.
Dr. Tezla's team used to be larger, with Alec Wood, Dan Dresden, and Banjee Castillo also on his team, racing in the realms. Before the events portrayed in Ignition, Alec, Dan, and Banjee did not exist. They got lost in the realms and soon after Tezla sends GIG to get help from Vert and his friends who raced for him before.
Kadeem fell in the Storm Realm, only to be captured by the drones.
How the other drivers vanished is unknown, but they are presumably among the Silencerz.
Link to the wiki in Spanish: http://es.hot-wheels-acceleracers.wikia.com/wiki/Equipo_Tezla