"In regards to Jack's temperament -- no doubt he was extremely patient and the consumate strategist in managing his game -- however, there were times when Jack was too cautious and it cost him -- see the '72 BO as one example "
Matt:
I just can't let this statement go unchallenged. Jack lost the '72 BOpen at Muirfield for a few reasons (mostly Trevino's incredible play the last two days), but being "too cautious" is simply an unfair characterization.
Recap: Among the contenders, Jacklin shot 69 the first day, Jack 70 and Trevino 71 on a day when only two players broke 70 in tough conditions. He followed with a 72, and was 142 and only one back of Trevino and Jacklin, co-leaders at 141. Nicklaus played indifferently in the third round -- an even-par 71 -- but it was more the result of poor ball striking and putting, rather than cautious play. Jacklin was terrific with a 67 (he was, along with Trevino and Jack, arguably the best player in the world at the time), and Trevino's 66 included five straight closing birdies, including two chip-ins.
Nicklaus, six behind Trevino and five behind Jacklin entering the final day, put on one of the great charges in the BOpen on the opening holes of the last round. He birdied the 2nd and 3rd holes, barely missed an eagle on the 5th (tap-in birdie), then birdied the 9th. After a birdie at the tough 10th hole set up by a very bold approach, Jack held the lead alone. Hardly cautious play. He then birdied the 11th after twice having to back off his putt when both Trevino and Jacklin, to the roars of the crowd, sank eagle putts on 9. Jack continued to play great tee to green, but missed birdies putts, all under 20 feet, on the next three holes. At 15, tied for the lead, Jack hit his approach shot to 8 feet from the hole, only to lip out the putt. Two poor shots on 16 and 17, both of which found the rough, resulted in a bogey and then a par on the birdieable par 5 17th. He then missed another birdie putt on 18, settling for a 66 that Henry Longhurst said legitimately could have been a 62; indeed, Nicklaus said 66 was about as poor a score he could've recorded that day. Trevino went on to win, of course aided by his chip-in par at 17, Jacklin's succeeding three-putt bogey there, and Lee's wonderful approach to eight feet on 18.
Jack's loss at Muirfield is more fairly characterized as just coming up short in the face of Trevino's great shotmaking over the final two days of the tourney, and a poorly timed (last seven holes) lapse in his putting stroke -- not cautious play.