In the 1980s, Rocca struggled to retain a European Tour card and made several trips to the Qualifying School. He began to make major strides in his career in 1990, which was the first season that he finished high enough on the Order of Merit to gain a tour card automatically. By 1993, he had risen to sixth in the Order of Merit, and his two best seasons were 1995 and 1996, when he finished fourth. He won five titles on the tour, the first of which was the 1993 Open de Lyon and the most prestigious of which was the 1996 Volvo PGA Championship.