By Geoff Kimmerly
Second Half editor

The Girls Basketball District Tournament tipped off Monday and the biggest wave came out of the Upper Peninsula, where Gladstone set the tone as top-two seeds won 90 percent of their games but the other 10 percent earned most of the biggest headlines.

1. Girls Basketball: Gladstone earned the biggest upset of District opening night, draining a last-second 3-pointer to get past previously-undefeated Menominee 46-45 in Division 2 – Escanaba Daily Press

2. Girls Basketball: Flint Carman-Ainsworth won a Division 1 matchup of league champions, downing Flushing 48-38 – WJRT

3. Girls Basketball: Cadillac won a matchup of league champions in Division 2, downing Ludington 43-39 – Cadillac News

4. Girls Basketball: East Kentwood ended Byron Center’s 19-game winning streak with a 50-43 win in Division 1; both teams were league champions this winter – WZZM

5. Girls Basketball: Eaton Rapids upset a league champion in Chelsea 58-49 in overtime in a Division 2 opener – Chelsea Sun Times News

6. Girls Basketball: Mayville got past a league champion in Kinde-North Huron 43-41 in Division 4 – Huron Daily Tribune

7. Girls Basketball: Bridgeport also upset a league champion, downing Caro 56-35 in Division 2 – Saginaw News

8. Girls Basketball: Jackson Lumen Christi ended the season for another league champion in Springport, 42-39 in Division 3 – Jackson Citizen Patriot

9. Girls Basketball: Cass City opened Division 3 play with an upset, downing Harbor Beach 46-34 – Huron Daily Tribune

10. Girls Basketball: Megan Matson led a Division 4 upset with 33 points in Munising’s 51-47 win over Rock Mid Peninsula – Escanaba Daily Press

Also of note …

Girls Basketball: Kent City may have set an MHSAA record with 40 points in the first quarter of a big Division 3 win over Ravenna – Muskegon Chronicle

Boys Basketball: From Friday, Kinde-North Huron earned a share of the North Central Thumb League Stripes title with a big win over Akron-Fairgrove – Huron Daily Tribune

Boys Swimming & Diving: From Saturday, Battle Creek Lakeview – tied for No. 10 in Lower Peninsula Division 2 – locked up the Southwestern Michigan Athletic Conference championship – WWMT

Boys Swimming & Diving: From Saturday, LPD1 Ann Arbor Pioneer finished nearly 200 points ahead of a field that included three more top-10 teams to win the Southeastern Conference Red championship meet – We Love Ann Arbor