Lieutenant Teller was a male Human Starfleet officer in the 23rd century.
In 2257, he graduated with James T. Kirk from Starfleet Academy.
In 2267, he was a command division officer. When Kirk entered Starbase 11's M-11 Starbase Club, Teller was drinking a beverage and sharing an appetizer with Lieutenant Corrigan.
After Kirk's abrupt departure from the club, Teller walked past the entrance and studied the crowd.
Later, when Kirk returned to the club, Teller was at the bar and observed Kirk's entrance and meeting with Areel Shaw. (TOS: "Court Martial")