Twitter / Philadelphia 76ers Markelle Fultz

The Philadelphia 76ers are expected to select point guard Markelle Fultz first overall in the 2017 NBA draft. The 76ers moved into the top spot Monday by sending the third overall pick this year and a first-round pick in either 2018 or 2019 to the Boston Celtics.

It will take several years to truly evaluate the trade, but it does bring up the question: When has a team traded the No. 1 overall pick after the draft order was decided but before the start of the next NBA season? It has happened just four times since the NBA-ABA merger in 1976.

Here is a look at those trades and how they ultimately turned out.

2014: Cavaliers Trade Andrew Wiggins To Minnesota

Brace Hemmelgarn-USA TODAY Sports / David Liam Kyle/NBAE via Getty Images Andrew Wiggins, Kevin Love

The Cavaliers were in win-now mode after LeBron James returned that summer, making it easier for them to justify trading the highly touted Wiggins for Kevin Love. Although recent rumors have the Cavs shopping Love in hopes of acquiring another star wing player like Paul George or Jimmy Butler, there's no question that this trade worked out well for Cleveland, with three consecutive trips to the NBA Finals and a championship in 2016. Wiggins wouldn't have been ready to contribute to a championship run in his first three seasons, and he provided the Timberwolves with their first true rebuilding block. After adding Zach LaVine in 2014 and Karl-Anthony Towns in 2015, the Timberwolves are one of the more exciting young teams in the league.

1993: Magic Trade Chris Webber To Golden State

via eBay Chris Webber, Penny Hardaway

Orlando held the first overall pick but already had Shaquille O'Neal while the Warriors viewed Webber as the big man they had been needing for a long time. Golden State made an offer that the Magic couldn't refuse: Webber for Penny Hardaway, whom the Warriors took third overall, plus three first-round picks. The Magic went to the NBA Finals just two years later, but Webber ended up being the better long-term player as Hardaway struggled with injuries. Webber's best years didn't come for the Warriors, as he forced a trade at the start of his second NBA season because of a conflict with coach Don Nelson. It's hard to criticize the Magic for making this trade since they acquired three future firsts (with one of them turning into Mike Miller) just to drop down two spots and pick the player they admired all along.

1986: 76ers Trade Top Pick (Brad Daugherty) To Cleveland

via eBay Brad Daugherty, Roy Hinson

The 76ers were coming off a 54-win season and had a roster that featured Charles Barkley. With Julius Erving heading into his final season and owner Harold Katz intent on unloading Moses Malone, you would think that adding the first overall pick would be a great way to stabilize the team's future. The Sixers thought differently and pulled off two major trades just before the draft. One sent the No. 1 pick to Cleveland for Roy Hinson and $800,000, a large amount of money at the time for the NBA. Cleveland selected North Carolina center Brad Daugherty, who went on to become a five time All-Star in his eight seasons with the Cavaliers. Hinson lasted less than two seasons in Philadelphia before being packaged in a deal with New Jersey that sent Mike Gminski to the 76ers.

1980: Celtics Trade Top Pick (Joe Barry Carroll) To Golden State

via joebarrycarroll.com / eBay Joe Barry Carroll, Kevin McHale, Robert Parish

If you're a Boston fan who is unhappy about this week's trade with Philadelphia, take solace that the last time the Celtics dealt the first overall pick, everything worked out great. The Warriors selected Purdue center Joe Barry Carroll. The Celtics got Robert Parish and the No. 3 overall pick, which they used to take Kevin McHale. With the front line of Larry Bird, McHale and Parish, Boston made five NBA Finals and won three championships in the 1980s.

There were other two instances of the first overall draft pick being traded, and both came in the 1950s. Based on these four modern cases, only the 76ers in 1986 would want a do-over.

The one certainty about this year's Celtics-76ers trade is that Philadelphia now has one of the most exciting and dynamic young cores in the NBA, with Fultz joining Ben Simmons and Joel Embiid to form a potential big three. For the Celtics, this trade could be another step in the pursuit of a trade for a star player as it gives Danny Ainge an additional asset.

NBA Draft Trades Graphic

Story continues below