Ruddock also saw his playing days end prematurely by an accident at work in 1985 and has a close affinity to Horsman after handing him his first international cap.
"My link with Chris is a particularly strong one as I gave him his first cap for Wales," said Ruddock.
"It's therefore a big blow for the club and particularly for Chris that he has had to retire from rugby and I know how difficult that is to deal with having gone through something similar myself many years ago.
"He has been a fantastic player for his club and I wish Chris every success in the new challenges ahead. Chris will always be welcome back here at Sixways Stadium at any time."