'Bachelor' star and former NFL player Colton Underwood better avoid his ex-girlfriend, Cassie Randolph, at least until he can plead his case in front of a judge ... TMZ has learned.
According to new court docs, a judge signed off on Cassie's request for a temporary restraining order against Colton, requiring him to keep at least 100 yards from her, her home, her work and avoid any contact or threatening behavior.
In October, he'll have a chance to appear at a hearing where he can argue his side of things .