The reason Tiger doesn't have a rival is because no one else in golf today has stepped up to his level. Overall, Tiger's competition isn't lacking from Jack's competition. If anything, the competition today is much stiffer than Jack ever saw. Tiger is just that good.

There are at least 10 golfers today that have the talent to challenge Tiger in the way that Seve and Watson and Player and Palmer (and several others) challenged Nicklaus. But they don't have the same mental game that Tiger has, and that is why they don't challenge him on a regular basis.

Even Jack didn't have the same mental game that Tiger has. I was watching a masters replay last night from over 20 years ago (I forget the exact year), and Jack held a big lead in the 2nd round, but then gave back 3 or 4 strokes in a few holes. Then he had a big lead again in the 3rd round and again gave back 3 or 4 strokes in a few holes. I've never seen Tiger do that in a major ... have a lead and give back 4 strokes twice. Plus Tiger overall has a vastly superior win percentage in overall tournaments. He plays a great game every time he goes out, and when he struggles, he still almost always makes a top ten.

Jack elevated his game for the Majors. Tiger doesn't elevate his game. He plays the best he can every tournament.