The deal comes after Butler turned down a four-year, $110 million extension from the Timberwolves during the offseason and was not moved after the Rockets reportedly offered four first-round picks to acquire him.
ESPN reported that Butler will go to Philadelphia in a package that includes Robert Covington and Dario Saric, Jerryd Bayless and a 2022 second-round pick.
Meanwhile, Philadelphia has started off slow and played flat - while they are 8-5 they have the point differential of a team 6-7 (a net rating of -0.6) with a bottom ten offense. A call with the league office to finalize it is expected Monday, sources said.
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A hotline has been set up for family members looking for information at +592-261-2281 or +592-600-7022. It returned to Georgetown's Cheddi Jagan International Airport just before 2am local time (6am GMT).
Forwards Dario Saric and Robert Covington are both going to Minnesota in the deal.
Butler and the Sixers "fully expect" to come to terms on a long-term contract this summer, Wojnarowski added.
In the end, Twitter wasted no time reminding everyone that the Sixers might have won the trade, but it's still the Golden State Warriors' world.
It was well known that head coach and president of basketball operations Tom Thibodeau had zero interest in forking over Butler for future assets, therefore forfeiting the balance of the 2018-19 campaign.