Crawley manager Steve Evans said: "The heavy investment in our squad has seen the arrival of Dean Howell and Kyle McFadzean, who can both play left-back.
"Darragh clearly wants to play and as fourth or fifth choice he felt he would not attain first-team football."
He added: "His thought process is understandable. Everyone at the Broadfield Stadium wishes Darragh all the best for the future."
Source: BBC Sport
Source: BBC Sport