The Rays re-signed Slater to a minor-league contract Tuesday.
Slater opted out of his minor-league deal with the Rays last week, but he was ultimately re-signed to a new deal. The veteran outfielder has hit .305/.407/.453 in 35 games with Triple-A Durham but has managed just a .231/.311/.277 batting line across 28 contests between three different big-league teams this season.