In 1994, he quit life as a touring professional and started working as a club pro on Long Island.

[7] However, he eventually stopped attending school during the day, practicing golf exclusively during the mornings and afternoons while taking night classes in an effort to earn his diploma.

"[12] In the early 1980s, Hartmann played a number of state opens across the country in an effort to prepare himself for PGA Tour tryouts.

Hartmann opened with a 70 to put him in the top ten, tied with Lee Trevino and Lanny Wadkins.

[33] According to the Miami Herald, though content with his play Hartmann wanted to improve and, in his words, move on to the "big time.

[35] In the final round, he continued to play well, birdieing three holes in the middle of the front nine to take a three shot lead over Marsh.

In the finals, playing Mats Lanner, he scored six consecutive birdies in the middle of the match for an "easy" 5 & 4 win.

In the first round he "upstaged his more illustrious rivals," recording seven birdies, on his way to a course record-tying 66 (−6) and a one shot lead over Seve Ballesteros.

[47][48] In the middle of the tournament, Hartmann shot rounds of 72 and 70 "to remain in contention," three back of Ballesteros, now the leader, in a tie for third with Bernhard Langer.

Hartmann closed with rounds of 68 and 67, including birdies on four of his last eight holes, to record a joint fifth place finish.

At the end of 1987, like he had in previous years,[58] Hartmann returned to the United States in an attempt to earn his PGA Tour card.

At the Twee Jonge Gezellen Masters, Hartmann finished joint second with Ernie Els and Tertius Claassens, one back of champion Hugh Baiocchi.

Hartmann failed to break par the first two days but closed well, with rounds of 71 and 69, to finish in solo fourth place.

At the Austrian Open, Hartmann fired a third round 66 to put him in solo third place, only behind leaders Bernhard Langer and Lanny Wadkins.

[26] Overall, for the year Hartmann made the cut in 16 of 25 events with five top tens, his most ever for a single season, and finished 39th on the Order of Merit.

He failed to finish inside the top 100 of the Order of Merit each year and ceased playing on the European Tour after the 1993 season.

"[71] Hartmann "finally tired of the lifestyle" as a touring professional and "took the suggestion of an old friend Darrell Kestner to move to Long Island and seek a job as a club pro.

[75][70][76] After the Met PGA season ended, Hartmann intended to play tournament golf in South America in the fall.

In the second round, Hartmann birdied the first hole on the way to shooting a 66 (−5), one off the course record, to take a three-stroke lead.

[80] Hartmann finished in second place on the Met PGA Player of the Year standing, only behind Bruce Zabriski.

In the final round, Hartmann played "steady, relentless golf" early to overtake Weiss who struggled.

"[89] In June, Hartmann played the three-round Long Island Open at Bethpage's Red Course.

[91][93] Hartmann ultimately finished in second place at the Met PGA Order of Merit, only narrowly behind Ron McDougal.

Each player had to put up $50,000 to enter the event which guaranteed $3 million in prize money to the winning team.

"[129] He earned the rights to play a sectional qualifier for the 2006 U.S. Open and was paired with David Gossett and Michelle Wie.

The two-round event was held at two different courses on Canoe Brook Country Club in Summit, New Jersey.

[6] At the two-round qualifier, Hartmann opened well, birdieing the first hole and remained near the prospective cut-off for most of the first round.

[134][133] For the remainder of his career on the Met PGA, Hartmann continued to place high, recording a number of runner-up finishes.

Hartmann opened with rounds of 69 and 71 to put him two back, in solo third, and earned rights to play in the final group.

[154] Hartmann served as a pallbearer at Gerulatis' funeral after he abruptly died of carbon monoxide poisoning in September 1994.