McCullers (back) will return from the disabled list Saturday to take the mound against the Mariners, Julia Morales of Root Sports Southwest reports.
McCullers landed on the disabled list June 12 with lower-back discomfort but has successfully ramped up his rehab, throwing a couple of bullpen sessions over the past several days. The 23-year-old last faced the Mariners on April 4, allowing one earned run on five hits, two walks and seven strikeouts over six strong innings.