<Li> U.S. Senior Open--no gender restriction, players age 50 & older, handicap index requirement of 3.4 or less, established in 1980 . </Li> <Li> U.S. Senior Women's Open--women's players age 50 & older, starting in 2018 . </Li> <P> Professional golf in the U.S. is mainly run by the PGA Tour, the LPGA, and the PGA of America . However, the USGA is at the heart of amateur golf in the country and organizes the 10 national amateur championships . The leading events are open to all age groups, but are usually won by golfers in their early twenties who are working towards a career in professional tournament golf: </P> <Ul> <Li> U.S. Amateur--no age or gender restrictions, handicap index of 2.4 or less, established in 1895 . </Li> <Li> U.S. Women's Amateur--no age restrictions, females with a handicap index of 5.4 or less, established in 1895 . </Li> </Ul>

Is the usga the same as the pga