The Little Falls Flyers handed Zimmerman a 7-2 loss on Friday in Zimmerman, with Allea Cekalla pitching five solid innings and Jamie Jenk going 3-for-4 with two RBI.
For Zimmerman (1-6), Morgan Feldick was 3-for-3 and Gabby Antolak 2-for-4. Brooke Larson and Ashley Pool pitched. Pool had three strikeouts in 2 1/3 innings.
The Thunder will play at Princeton on Tuesday.