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Did Phil Mickelson play golf in college?
Phil Mickelson attended Arizona State University in Tempe on a golf scholarship.
Did Phil Mickelson win any championships while he was in college?
Phil Mickelson became the face of amateur golf in the United States, capturing three NCAA individual championships and three Haskins Awards (1990, 1991, 1992) as the outstanding collegiate golfer
Did Phil Mickelson play professionaly after college?
Phil Mickelson graduated from Arizona State University in June 1992 and quickly turned professional.
Did Phil Mickelson ever lost a championship or a final?
Phil Mickelson ended up finishing tied for second with Jason Day, two strokes behind Justin Rose. It was the sixth runner-up finish of Mickelson's career at the U.S. Open.
Are there any other interesting aspects about the Phil Mickelson article?
In 1990, Phil Mickelson became the first with a left-handed swing to win the U.S. Amateur title.
Did Phil Mickelson win any other tournaments while he was in college besides the U.S. Amateur?
Phil Mickelson secured perhaps his greatest achievement as an amateur in January 1991, winning his first PGA Tour event, the Northern Telecom Open, in Tucson.
Did Arizona State University ever honor Phil Mickelson?

Question: What did he do after college?
Self-contained rewrite: What did Phil Mickelson do after college?