The 21st overall pick in this year's draft was awarded the summer's MVP award after averaging 14.6 points and 8.6 rebounds.
The Rockets and Clippers are the 6-7 wing's most aggressive suitors, according to Stadium.
Dwight Howard will be playing for his fifth team in five years in 2019-20, but where that will be is still unknown.
The Lakers, Rockets, Mavericks, Clippers and Nuggets are all rumored to be interested in Iguodala.
Chicago has discussed a sign-and-trade that would send Dunn to the Grizzlies in exchange for Holiday, according to the Chicago Tribune.
The point guard's agent, Kevin Bradbury of BDA Sports, confirmed the news to ESPN as he congratulated his client on Twitter.
Andre Iguodala will have his number nine jersey retired by the Golden State Warriors after he was traded to the Memphis Grizzlies.
In an increasingly bulked up West, the Nuggets (54-28 in 2018-19) are looking to improve on last year's conference semifinal appearance.
The Grizzlies are freeing up salary space to go after free agents.
The Bulls, Clippers, Pacers, Wizards, Hornets and Cavaliers are all also interested in signing Holiday, according to The Athletic.