Coselman has previously been named Hornet of the Week and MIAA Player of the Week this season.
Blake Bean, Spencer Baldwin, Doug Propson and Jack Brockhaus all received First Team honors.
Kalamazoo won the regular season finale 4-3 on a walk-off double in the 8th.
Adrian defeated Kalamazoo 11-1 and 11-2 on Friday.
Dr. Marin Heinritz and Professor Amy MacMillan were honored as MVPs.
This is the second time this season Jack Brockhaus has been honored by SAAC.