Uh, Moxie, please don't include Connors in that list.
He didn't play anywhere as many matches on clay (255) as on hard (623) and carpet (412), but he still won 12 titles and 198 matches on clay including the
US Open on clay and has an excellent match percentage on clay(.776). He was the only player in history to win the US Open on all 3 surfaces.
He missed, count them,
5 years worth of French Opens when he was at his peak in the 70's (74-78), because he was forbidden to play by RG organizers because of his contract with WTT, just as Borg was forbidden to play in 1977. Some felt that had he been allowed to play RG in 1974, he might have won the Grand Slam that year, since he won the other 3 majors and Borg was still very young. We'll never know.
By the time Connors was playing Roland Garros again, Borg was the King of Clay, and it wouldn't be until 1982 where Connors would have a legitimate shot again. Still he made 2 semifinals and a QF in '79-'81. But by 1982, he was close to 30.and don't forget, there are very few players that have won Roland Garros past 30. Not only that, but the depth of competition on clay was quite high in the 70's and 80's. In the 1980's, following Borg's departure, several players came into their own on clay, including Wilander and Lendl who won 3 French Opens each in the 80's, but the aging Connors still managed to get to 2 semifinals and 3 quarterfinals at RG between 1982 and 1987. All told he had 4 semis and 4 QF at Roland Garros from '79-'87. Connors was a rare player who was extremely consistent and had extreme longevity. From 1974 to 1985, 12 years, he missed making only 1 QF in the majors he played (4th R. Wimbledon 1983).
Respectfully,
masterclass