McIntyre, 24, appeared in 31 games for Providence last season, compiling a 21-6-2 record with a 2.03 goals-against average and a .930 save percentage. McIntyre led the AHL in save percentage and ranked second in GAA.
The 6-foot-2, 206-pound netminder was also selected to play in the 2017 AHL All-Star Classic and was named an AHL Second-Team All-Star.
McIntyre also played in eight games with Boston in 2016-17, posting an 0-4-1 record with a 3.97 GAA and an .858 save percentage.
The Thief River Falls, Minn., native was selected by Boston in the sixth round (165th overall) of the 2010 NHL Entry Draft.
Subban, 23, appeared in 32 games for the Providence Bruins during the 2016-17 season, posting an 11-14-1 record with a 2.41 goals-against average and a .917 save percentage. The Toronto, Ont., native also appeared in one game for Boston last season. Over his four-year AHL career, Subban has manned the pipes for 127 games, posting a record of 56-45-19 with a 2.40 GAA, a .918 save percentage and six shutouts.
The 6-foot-2, 200-pound goaltender was drafted by the Bruins in the first round (24th overall) of the 2012 NHL Entry Draft.