Mickey Callaway said Monday that Todd Frazier, who has been out since late-February due to a strained oblique, will begin a rehab assignment later this week.
Meanwhile, Jed Lowrie (knee) recently began fielding ground balls and swinging a bat from both sides of the plate, though he as yet to be cleared to run at full speed. Lowrie has been idle most of the spring as he continues to deal with a capsule sprain in his left knee.
If I'm guessing, I'd say Frazier will be back next week, while Lowrie remains out through most of April.