ESPN: Boston Celtics: B
"... [because of other roster additions there was] little room for Dunn -- or Edwards, a holdover on the roster -- to earn regular minutes. As a result, sending both of them out for a forward who can hypothetically provide floor spacing made sense for the Celtics."
"It's important to note that Hernangomez's stretch ability hasn't really shown up much in practice since he made 41% of his 3-point attempts as a rookie."
"Hernangomez's 2022-23 salary is entirely non-guaranteed through the day before free agency. So the Celtics aren't taking on additional long-term salary with this deal and could pay Hernangomez less than Dunn and Edwards if he fails to reach the performance incentives."
"A 2-for-1 trade opens up a roster spot for Parker, who otherwise would have had to beat out a player with a guaranteed contract to make the team. However, Parker fills a similar role to that of Hernangomez, and Boston might now prefer to add a guard or keep the 15th roster spot open for midseason deals."
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IOW is a low-cost move to shore up the PF and provide more flexibility. MEM got a C. They now have 18 players under contract after buying out Rondo earlier this week.