Trejo signed a minor-league contract with the Dodgers on Tuesday and was assigned to Triple-A Oklahoma City, Eric Stephen of SBNation.com reports.
Trejo cleared waivers Saturday after being designated for assignment by the Rockies. He refused an outright assignment, so he became a free agent. The infielder was 9-for-63 with Colorado this season and had posted a 61 OPS+ in four seasons.