Ruiz capped a man-of-the-match display against Wycombe Wanderers with a superb second when he curled home a fine free-kick from 25 yards.
"He took the free-kick well," said Jol. "He's a terrific player who I know well. Hopefully he can show our fans now what he can do. He was out for a few months last season with an horrific injury so I was very happy to see him.