According to Jake Fischer of The Stein Line (Marc Stein’s Substack), the Milwaukee Bucks have been making calls to find a way to add a lob-threat type of center to complement Brook Lopez. You can find the piece here (most of it is behind a paywall, just FYI).
Fischer also noted that Lopez himself has generated a ton of interest in the trade market since last summer. Some of the options as far as tradeable bigs go (not just Bucks trade targets) include the Portland Trailblazers’ Robert Williams, the Utah Jazz’s Walker Kessler, and the Brooklyn Nets’ Day’Ron Sharpe.