Bainbridge beat Nathan Hale 56-51 last week in the Spartans' best win of the year.
Kyle Jackson had 28 points, including six three-pointers. Ben Beatie finished with a double-double, with 15 points and 11 rebounds.
The Spartans took the Fighting Irish to the edge, but O'Dea escaped with a 57-52 overtime win in junior varsity boys basketball Friday.
It was a back-and-forth battle. The Irish took a 15-12 lead at the close of the first quarter, but the Spartans jumped in front, 16-15, with 6:56 remaining in the first half.
Bainbridge then pushed its lead to five points, 22-17, with 4:18 to go.
The Spartans were stymied by O'Dea's tough defense and cold shooting in the paint, however. O'Dea held Bainbridge scoreless through the remainder of the half as the Irish exploded for 10 points in just over two minutes.
O'Dea led 31-22 at the break, but Bainbridge rebounded in the second half.
The Spartans saved a big surprise for the end. Bainbridge sophomore Casey Brink forced overtime with a three-pointer with 20 seconds left in regulation. He finished with 11 points.
Beatie again led the Spartans in scoring. He had 16 points, plus 16 rebounds.
"Beatie is coming along, really improving on the defensive end and at rebounding and being a presence on the court," said Spartan JV Coach Henry Guterson.
"We are 5-11 and I'm looking forward to our last four games. We have gotten so much better and the team's potential is exciting to think about," he said.