The Athletics claimed Roycroft off waivers from the Rays.
The Athletics transferred Wilson (shoulder) to the 60-day injured list Tuesday.
Hernandez is absent from the lineup for Tuesday's game in Atlanta.
The Dodgers activated Glasnow (back) from the 60-day injured list Tuesday.
Langeliers (knee) has begun hitting and throwing progressions, Martin Gallegos of MLB.com reports.
Double-A Midland placed De Vries on its 7-day injured list Tuesday while he recovers from a sore right shoulder, Martin Gallegos of MLB.com reports.
Bolte went 3-for-5 with a double and a run scored in Sunday's 7-6 win over the Astros.
Serven went 2-for-4 with a three-run home run in Sunday's 7-6 win over the Astros.
Harris recorded a save Sunday against the Astros, striking out two in a perfect ninth inning.
Perkins (3-9) earned the win Sunday against the Astros, allowing three runs (one earned) while walking five and striking out six over five innings of relief.
