Allison Wujek's put-back off an offensive rebound with 30 seconds to play proved to be the deciding basket in the Irish's win over the Cougars in a 2B girls consolation game on Friday.
White Swan opened the second quarter on a 5-0 run to take a 19-9 lead, but DeSales didn't give in.
Ashlyn Lyons and Wujek combined for 21 points for the Irish, which held the Cougars to just two points in the final quarter.
Emily Botkin led White Swan with 18 points and 14 rebounds, both game highs.
Baumgart 2, James 0, B. Lyons 0, Acock 2, Conley 0, Lesko 7, Al. Lyons 0, Wujek 10, Leahy 2, As. Lyons 11.
Whitesell 4, Abrams 0, Fiander 1, Spencer 0, Ryan 2, Bill 4, Ramsey 0, Jones 4, Botkin 18.