Rutschman is absent from the lineup for Wednesday's tilt versus the Angels.
Atlanta activated Lopez (knee) from the 15-day injured list Wednesday.
Atlanta placed Elder on the 15-day injured list Wednesday due to arthroscopic right knee surgery.
Atlanta selected Falter's contract from Triple-A Gwinnett on Wednesday.
Atlanta designated Hernandez for assignment Wednesday.
Smith-Shawver (0-2) took the loss Tuesday against the Rays after allowing four runs on five hits and two walks while striking out three over 3.1 innings.
Houck (elbow) allowed one run on two walks over two-thirds of an inning for Double-A Portland on Tuesday, Ian Browne of MLB.com reports.
Crochet (shoulder) threw 20 pitches consisting of fastballs and complementary offerings during a side session, Ian Browne of MLB.com reports.
Sandoval (1-5) took the loss against the Angels on Tuesday, allowing four runs on 10 hits and two walks while striking out seven across six innings.
Elder is expected to be sidelined 3-to-4 weeks after undergoing arthroscopic surgery on his right knee Tuesday, Mark Bowman of MLB.com reports.
