The Pirates have optioned Nick Kingham, Max Moroff, and Christopher Bostick to AAA Indianapolis and have reassigned 8 others to minor league camp according to their Twitter account:
ROSTER MOVES— Pirates (@Pirates) March 20, 2018
Optioned to AAA Indy:
Reassigned to minor league camp:
37 active players now remain in big league camp.
Kingham had a rough five outings this spring, posting a 8.76 ERA and striking out only 8 in 12 1⁄3 innings. Moroff was 6 for 28 with one home run and a .741 OPS and Bostick was 6 for 35 with one home run and an OPS of .608 this spring. All three have a good chance to see some time with the Pirates this year, though Moroff is likely to be an early call-up if anything happens to Harrison, Frazier or Rodriguez.