Display only specific text in bash output

I am making a system info script which will output what version of CentOS a machine is running.

Currently, I have the following:

#!/bin/bash
DISTRO=$(cat /etc/redhat-release)

echo "OS Version: $DISTRO" 

For the output, I get the following:

OS Version: CentOS Linux release 7.9.2009 (Core)

I would like to know how I can remove the (Core) section of the output.

Thank you for your help.