Conversation so far:
Did Phil play golf in college?
Mickelson attended Arizona State University in Tempe on a golf scholarship and became the face of amateur golf in the United States.
Did Phil win any championships while he was in college?
capturing three NCAA individual championships and three Haskins Awards (1990, 1991, 1992) as the outstanding collegiate golfer.
Did he play professionaly after college?
With three individual NCAA championships, he shares the record for most individual NCAA championships alongside Ben Crenshaw.
Did he ever lost a championship or a final?
Mickelson secured perhaps his greatest achievement as an amateur in January 1991, winning his first PGA Tour event, the Northern Telecom Open, in Tucson.
Are there any other interesting aspects about this article?
At age 20, he was only the sixth amateur to win a tour event and the first in over five years after Scott Verplank at the Western Open.
Did he win any other tournaments while he was in college?
In 1990, he also became the first with a left-handed swing to win the U.S.
Amateur title.
Did Arizona State University ever honor him?
Mickelson also led the Sun Devils to the NCAA team title in 1990.

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