Iowa Western won the nightcap, 11-3, in five innings.
Jackson went 3-for-3 with four RBIs and scored three runs in the 9-1 victory, which ended after six innings due to the mercy rule. She is tied for third in the country with her 14 homers.
Iowa Western led 11-0 heading into the bottom of the fifth inning of Game 2. Kirkwood scored three times, but it was not enough to stay alive due to the eight-run mercy rule.
The split left the fifth-ranked Eagles at 31-10 at the NJCAA Division II level. Iowa Western is 26-16 at the NJCAA Division I level.
Iowa Western 000 010 - 1 2 x
Kirkwood 202 041 - 9 10 2
Hocker and Butler. W - Hocker (15-6). 2B - Jackson, Finn. 3B - Smith. HR - Jackson. RBI - Kuch, Jackson 4, Klaahsen 2, Finn. SB - Hulsebus 2, Barthelman.
Iowa Western 400 07 - 11 5 x
Kirkwood 000 03 - 3 6 3
Bouman, Parham (5) and Barthelman. L - Bouman (14-4). 2B - Kuch. RBI - Hulsebus, Stewart, Kuch. SF - Kuch.