Keep an eye on Kemp (25), Kennedy (26) [Don Money's grandson], Crawford (21) and Rincones (24).
All in AAA, all off to solid starts, even if Rincones is strictly a platoon LH (OPS .261 v LH, .898 v RH)
Crawford on the other hand, .988 against LH, .756 against RH. (.734/.815 last season)
Castro (26) is playing SS, last year was a lost season for him, 22 HR in 566 AB in the majors at age 23-24, so if he's an adequate fielding SS, another depth piece with some upside left..
Problem is none of the RH IFs are being used in LF, it's hard to see any upside in Mercado or Stevenson.
If Crawford comes up, it'll be to play every day, so only need one corner RH OF.