No, that's a _ren’yōkei_ A _ren’yōkei_ mid-sentence is for coordination, like English “he sat, **and** …”. You can think of it as a literary equivalent of
_Kateikei_ is what comes before _-ba_ , so in this case it would be _kake **re** -_. Full table, with sample context:
* - _kake-_ _(-nai)_
* - _kake-_ _(-masu)_
* _kake-ru_ _(yo.)_
* - _kake-ru-_ _(hito)_
* - _kake-re-_ _(-ba)_
* _kake-ro/kake-yo_ _(!)_
This is because _kakeru_ is a vowel-stem _(ichidan)_ verb. Perhaps you were thinking of consonant-stem _(godan)_ vebs, such as _kaku_. These have different vowels depending on the inflection:
* - _kak-a-_ _(-nai)_
* - _kak-i-_ _(-masu)_
* _kak-u_ _(yo.)_
* - _kak-u-_ _(hito)_
* - _kak-e-_ _(-ba)_
* _kak-e_ _(!)_
Notice the difference between and ****