May line holders and junior pilots. There were captains that were more junior at most of the bases that got a line, but they were build ups (vacation or recurrent) so I didn’t include those in the most junior line holders.

DEN CA Line holder 5/2015
DEN CA most junior 9/2016
DEN FO line holder 11/2017
DEN FO most junior 12/2017

STL CA line holder 2/2016
STL CA most junior 5/2017
STL FO most junior and line holder 12/2017

ORD CA line holder 12/2015
ORD CA most junior 6/2017
ORD FO most junior and line holder 10/2017

DTW CA line holder 10/2016
DTW CA most junior 6/2017
DTW FO most junior and line holder 10/2017

RDU CA line holder 2/2016
RDU CA most junior 6/2017
RDU FO line holder 10/2017
RDU FO most junior 11/2017