<P> The U.S. Senior Open is one of the five major championships in senior golf , introduced 37 years ago in 1980 . It is administered by the United States Golf Association ( USGA ) and is recognized as a major championship by both the PGA Tour Champions and the European Senior Tour . The lower age limit was 55 in 1980 , but it was lowered to 50 for the second edition in 1981 , which is the standard limit for men 's senior professional golf tournaments . By definition , the event is open to amateurs , but has been dominated by professionals ; through 2016 , all editions have been won by pros . Like other USGA championships , it has been played on many courses throughout the United States . </P>
<P> The U.S. Senior Open is one of the five major championships in senior golf , introduced 37 years ago in 1980 . It is administered by the United States Golf Association ( USGA ) and is recognized as a major championship by both the PGA Tour Champions and the European Senior Tour . The lower age limit was 55 in 1980 , but it was lowered to 50 for the second edition in 1981 , which is the standard limit for men 's senior professional golf tournaments . By definition , the event is open to amateurs , but has been dominated by professionals ; through 2016 , all editions have been won by pros . Like other USGA championships , it has been played on many courses throughout the United States . </P>
how old do you need to be to play in the senior open
how old do you need to be to play in the senior open
50
50