The Detroit Pistons were finalizing a trade Monday night to acquire star forward Blake Griffin from the Los Angeles Clippers, said a person with knowledge of the deal. The person spoke on condition of anonymity because the trade had not been announced. The Pistons would send forward Tobias Harris, guard Avery Bradley and center Boban Marjanovic to Los Angeles, with the Clippers also receiving draft picks. Detroit also would receive forward Brice Johnson and center Willie Reed. ESPN first reported the deal.