The Mariners signed Calixte to a minor-league contract, Matt Eddy of Baseball America reports.
After making 29 appearances for the Giants in 2017, Calixte played exclusively at the Triple-A level last season, slashing .270/.323/.405 across 545 plate appearances with Sacramento. Though he'll likely get an opportunity to audition for the Mariners at big-league spring training, it's expected that Calixte will stick around in the Pacific Coast League in 2019 at Triple-A Tacoma.