The DCL will drop from 12 schools to 10 in the fall, when Arlington officially becomes a member of the Middlesex League and Tyngsborough of Mid-Wach C in the Central Mass district.
"We've had conversations with the schools, and there's probably issues regarding whether they would accept an invitation," Haley said. "Instead of wasting everybody's time, we're not going to try to do something fairly quickly that will end up causing a lot more complications."
Haley confirmed that the principals and athletic directors will still meet on Monday.
(Updated, 3 p.m.) Editor's note: Antonellis later confirmed that while Billerica, Chelmsford and Tewksbury have withdrawn their applications, North Andover will wait to hear of any change of plans from the DCL.