In the Czech Extraleague nine games were played from Friday to Tuesday. Draci Brno won its series against Kotlarka Prague. Technika Brno and Olympia Blansko split a two-game set, as did Cardion Hrosi Brno and Skokani Olomouc. Arrows Ostrava won twice over the Tempo Titans Prague. The Eagles Prague beat the Trebic Nuclears.
Results:
| Pá 18. 5. 2018 | 19:00 | Olympia Blansko | Technika Brno | 0:6 |  |
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| 19:00 | Draci Brno | Kotlářka Praha | 3:1 | |
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| So 19. 5. 2018 | 13:00 | Cardion Hroši Brno | Skokani Olomouc | 0:5 | |
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| 14:00 | Tempo Titans Praha | Arrows Ostrava | 1:3 | |
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| 14:00 | Kotlářka Praha | Draci Brno | 3:6 | |
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| 14:00 | Technika Brno | Olympia Blansko | 4:11 | |
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| 16:00 | Cardion Hroši Brno | Skokani Olomouc | 11:1 | |
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| Ne 20. 5. 2018 | 13:00 | Tempo Titans Praha | Arrows Ostrava | 0:6 | |
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| Út 22. 5. 2018 | 19:00 | Eagles Praha | Třebíč Nuclears | 10:1 | |
Standings:
| W | L | % | GB | BA | ERA | FA | SKÓRE | ||
|---|---|---|---|---|---|---|---|---|---|
| Draci Brno | 18 | 1 | .947 | – | .3137 | 1.6 | .953 | 135:52 | |
| Arrows Ostrava | 15 | 4 | .789 | 3 | .3239 | 4.13 | .954 | 158:85 | |
| Cardion Hroši Brno | 12 | 5 | .706 | 5 | .2884 | 2.65 | .979 | 122:54 | |
| Kotlářka Praha | 12 | 5 | .706 | 5 | .2807 | 3.02 | .941 | 134:72 | |
| Eagles Praha | 10 | 6 | .625 | 6.5 | .3011 | 4.23 | .954 | 132:85 | |
| Třebíč Nuclears | 8 | 8 | .500 | 8.5 | .2272 | 4.74 | .92 | 87:100 | |
| Tempo Titans Praha | 4 | 13 | .235 | 13 | .1989 | 3.41 | .947 | 45:81 | |
| Skokani Olomouc | 4 | 13 | .235 | 13 | .2077 | 7.14 | .931 | 58:149 | |
| Technika Brno | 2 | 15 | .118 | 15 | .2123 | 5.92 | .928 | 53:146 | |
| Olympia Blansko | 1 | 16 | .059 | 16 | .1985 | 6.54 | .933 | 41:141 |