A professional is someone who plays tournaments with cash prizes. To get on the PGA Tour, you must qualify through Q-School. PGA cards are not given, they are earned. A professional plays tournaments for money, accepts money for lessons, takes a job as a golf pro... and yes, to receive a PGA Tour Card, Q-School is one way. There are others. Win 3 Nationwide events. Win the US Amateur. Or be like Tiger.
Tiger Woods
Seve Ballesteros
It only seems like he wins every week. He hasn't won all the tournaments he has entered, but his win percentage would be the best of any current PGA Tour golfer.
No Golfer has ever won the Grandslam.
2009
Jack Nicklaus had 73 PGA tour wins, 10 Champions Tour wins. His total number of professional wins is 113.
Ernie Els
4 PGA Tour victories, including one major, The 2005 Masters.
tiger woods is awesome
No, plenty have players have got a tour card without going to Q School, Rory McIlroy for example, he won a European Tour card from finishing high enough up the money list in tournaments he received exemptions in, them qualified for a PGA tour card from his world rank. Some players play a year on the Nationwide tour in an attempt to finish in the top 25 and win a PGA Tour card.
He won the Hawaiian Open with an Orange Golf ball.