What is your SS replacement? ADP wise, Jennings for ACab, not bad. Acab gets a little more valuable considering position. Jennings like players can be found really late, maybe even in the FA pool. So I'd keep Acab, or look for a better option for OF.
Anyway you looking for OF upgrade but wanna trade Beltran for a C upgrade? Maybe trade Acab for a C. Maybe keep Beltran.