Andres Torres and D.J. Carrasco are due to begin rehab assignments on Monday night with Class A St. Lucie.
Torres suffered a strained left calf on Opening Day. Carrasco sprained his right ankle during spring training.
That means Kirk Nieuwenhuis' tenure with the major league team potentially is on the clock.
UPDATE: Carrasco had a scoreless, eight-pitch inning that included one strikeout. Torres played six innings in center field. He went 3-for-4 with an RBI and two runs scored. He also stole two bases.