Yes they can.
The PGA European Tour is an organization that operates Europe's three leading men's professional golf tours. The PGA European Tour typically starts in the month of April.
Jimmy Kinsella
Arjun Atwal won the 2010 Wyndham Championship in Greensboro, North Carolina to become the first Indian player to win a U.S. PGA Tour title. He also has several title wins on the European and Asian Tours, and he is the first Indian to win a European Tour championship.
I would say he's trying to play in PGA tournaments or the PGA Tour of Australia.
Professional Golf Association
Dave Regan played professional golf in the late 50's and 60's. Won 3 times on the US pga tour. Finished 2 nd to Jack Nicklaus in the 1963 PGA. Solid player. Also appeared on Shells Wonderful World of Golf series.
No he didn't. He has dedicated his life to teaching the golf swing.
PGA CHAMPIONSHIP
Not that many, unless they want to. The WGC and Major events are co sanctioned so qualify as PGA Tour events. A player must play 15 events to keep their card, assuming they maintain exempt status.
PGA Tour Golf Team Challenge happened in 2006.
PGA Tour Golf Team Challenge was created in 2006.
Callaway Golf PGA Junior Series was created in 1996.