Only $10 million of Spencer Dinwiddie’s $18.9 million salary in 2023-24 is guaranteed. Only $5 million of Davis Bertans’ $16 million salary in 2024-25 is guaranteed. After acquiring both from Washington on Deadline Day for Kristaps Porzingis, Dallas will undoubtedly be hoping that one or both — if necessary — prove more movable in the second-to-last year of those contracts because of those partial guarantees than they are reputed to be.