No, he's tucked in behind Sheene with Hartog leading at the time. Roberts really spoiled Sheene's party when he turned up for the '78 season after Sheene's back-to-back world title wins in '76/'77 : learnt the tracks, ran Goodyear tyres, and blew him off for three years. Sheene never recovered, and in all his years of tv commentary never missed a chance to take a swipe at Roberts ("couldn't sort out a sock drawer", "couldn't develop a cold" etc).
He did a hell of a lot for public acceptance of bike racing, and was quite good fun : we shared a garage with him one weekend when he was racing his Manx at Eastern Creek, but man, the guy could whinge...