Thunder acquire G Kemba Walker, 2021 1st-round pick, 2025 2nd-round pick from Celtics for Moses Brown, Al Horford, 2023 2nd-round pick
I've read some comments from people not understanding this trade for the Celtics, but the individuals who have those opinions didn't watch Kemba Walker this past season. Walker was a shell of his former self. Now in his 30s, Walker is far from the player he once was. He has injury concerns, and he'll continue to decline rapidly in the coming years. He's also highly overpaid, so Boston did well to get rid of his contract, even if it meant surrendering a first-round pick in the upcoming draft.
Despite dumping a huge contract, the Celtics were able to obtain Moses Brown, which is a huge win. Brown is a talented, 21-year-old center with enormous upside. He had some big games this past season. It's puzzling to me why Oklahoma City let him go in this deal. It could be argued that with Walker's regression and dire medical issues, Brown is the best player in this trade.
So, the Celtics were able to shed a terrible contract and obtain a big man with huge potential for just a mid-first-round pick, which seems terrific. Al Horford doesn't have a good contract either, but there's far less guaranteed money on his deal. Plus, he can provide the Celtics with some much-needed interior defense this upcoming year.