Anthony Winbush scored a career-high 16points and grabbed eight rebounds and Dylon Cormier (Cardinal Gibbons) added 15 points as
Winbush played all but 21 seconds of the contest.
The Greyhounds held the Peacocks to 22first-half points and 38.8 percent from the field for the game.
Saint Peter's scored the first 11 points of the second half.
A 3-pointer from Desi Washington, who led all scorers with 18 points for the Peacocks (4-5, 1-1), extended the Peacocks' lead to seven points with 15:03 remaining in regulation.
The Greyhounds responded by locking down on the defensive end and forcing a 6-minute, 20-second Saint Peter's scoring drought that allowed Loyola to climb back into the contest and seal the victory.
"We took a punch from Saint Peter's when we stopped playing well on defense and executing on offense, but I was pleased with the way that we responded," Loyola coach Jimmy Patsos said.
"The guys knew that getting to 1-1 in the [MAAC] was very important, and I felt like they came out knowing that was the most important thing."
D.D. Scarver led all scorers with 20points for Marshall (6-4).
Cincinnati 92, UMES 60: Kyree Jones scored a game-high 25 points, but the Hawks (0-9) were blown out by the host Bearcats.
Cincinnati (9-0) had four players in double figures, including Sean Kilpatrick, who led the team with 23 points, and Cashmere Wright, who added 20 points and nine assists.
Christian Jackson scored a game-high 35points and added seven rebounds for Frostburg State (3-6, 1-1).
King had an offensive rebound and put-back as time expired in regulation to tie the game at 58 and send it to overtime.
The Sea Gulls went on a 5-0 run to start the overtime and cruised to victory, making all five of their attempted free throws in the final 46 seconds of the game.
Johns Hopkins 76, Muhlenberg 74: Freshman Austin Vasiliadis made a pair of free throws with 6.2 seconds remaining in regulation to lead the Blue Jays to victory over the Mules (5-3, 3-2 CC).
George Bygarinovic led Hopkins (5-3, 3-2) with 14 points.
Widener 87, Stevenson 64: Despite 15 points from Alfonzo Hawkins and 14points from Brett Burrier, the Mustangs (4-3, 1-3 Centennial Conference) were thrashed by the host Pride.
Dillon Fields led all scorers for Widener (2-5, 2-2) with 23 points.
McDaniel 70, Washington College 66: Tyler Rudd led all scorers with 22points and added 11 rebounds to lead the visiting Green Terror to a victory over the Shoremen (0-7, 0-5 CC).
Nic Martin added 13 points and five rebounds off the bench for McDaniel (3-4, 2-3).
Elizabethtown 65, Hood 64: Ben Cable made a 3-pointer with 3 seconds remaining in regulation to propel the host Blue Jays (2-6, 1-4 CC) past the Blazers.
Cable finished with a team-high 18 points and added five assists. Cameron Cook led all scorers with 21 points for Hood (4-4, 1-3 CC).
Goucher 67, Ferrum 48: Richard Harris led the Gophers (3-6) with 19 points, as Goucher cruised past the visiting Panthers.