Davis, Carlos Navarro, Jeff Massin and Tristan Pacba romped to an easy victory, nearly four seconds ahead of runner-up Nipomo (3:31.32).
Glendale's time was third best overall, behind Chino Hills (3:25.65) and Long Beach Jordan
Davis' top individual effort came in the 200, which he ran last and sprinted to fourth place in a time of 21.74 seconds.
"I'm just trying to get better times," Davis said. "That's always the goal."
Davis was within less than half a second of race-winner Khalfani Muhammad (21.32) of Sherman Oaks Notre Dame.
Muhammad proved a nemisis earlier in Davis' second event, the invitational 100, where Davis was consistent in running to a fifth-place mark of 10.79 in a race won by Muhammad (10.55).
Davis' mark matched his previous best time set two weeks earlier at the Arcadia Invitational.
"The heat didn't really affect me, I just wasn't ready for the [race] speed," said Davis, who ran in 90 degree-heat. "I just have to run full speed and not think as much."
Part of Davis' busy day included guiding the Nitros to a second-place finish in the fifth heat of the open 400 relay.
Davis, along with Massin, Navarro and Pacba, raced to a mark of 43.81, which trailed only Elk Grove Franklin (43.53).
Overall, the Nitros were sixth and won the local dual with Crescenta Valley's four of Byung Kim, David Lee, Steve Lee and Christ Ordookhanian, who finished sixth in their heat (47.05) and 44th overall.
Earning a medal at Mt. SAC is no small accomplishment and Glendale's Sophia Amodia was aware of that.
The Nitros' hurdler earned two bronzes, the first coming when she finished third in her first heat of the girls' seeded 300 hurdles with a time of 44.98, which was sixth overall.