Maine won its fourth game in a row and its second straight to start the America East schedule, pulling away from visiting Maryland-Baltimore County in the latter stages to take an 81-66 decision.
Justin Edwards and Alasdair Frasier led five Black Bears in double-figures with 17 points apiece, while Jon Mesghna had 16. Mike Allison had a double-double with 10 points and a team-high 10 rebounds and Xavier Pollard chipped in 10 points and seven assists for the Black Bears.
Chase Plummer led the Retrievers with 14 points, with Brett Roseboro chipping in 12 and Ryan Cook 10 in a losing effort.
The Black Bears (7-8, 2-0 America East) had a strong shooting game, converting 58 percent from the field (31 of 53), with the Retrievers making 44 percent (27 of 61). The Black Bears also won the battle on the boards, outrebounding the Retrievers 39-25.
The Black Bears opened the game by scoring nine of the first 11 points, but the Retrievers pulled back into the game and led 25-19 with 7:14 remaining in the half.
However, the Black Bears then went on a 14-0 run and took a 37-29 lead into halftime.
The Retrievers cut the gap to five on Cook's layup early in the second half, but the Black Bears steadily increased their lead to 14, at 56-42 with 9:52 remaining.
With some fight left, the Retrievers closed to within 64-61 with just under 4 minutes to play on a Brian Neller 3-pointer, but could get no closer.