Should the San Antonio Spurs want Montrezl Harrell?
The short answer is no. A lot of dominoes have to fall for Harrell to play for the Spurs, but on initial thought and with San Antonio's plethora of options in the offseason, settling for him should never be a primary or even a secondary resort to take.
Personally, the ideal center that the Spurs should pursue is someone who can defend the rim and make an impact from the perimeter to complement the team's abundance of aggressive drivers and springy guards. Luckily, San Antonio can realistically get their hands on one through the draft or free agency.
If Pop and the front office manage to select a prospect like Kai Jones or Alperen Sengun or wins in free agency by prying away John Collins from the Atlanta Hawks with their massive cap space, then Montrezl Harrell will not really fit a need anymore, even if he comes through the less expensive route of a sign-and-trade instead of unrestricted free agency if he declines his player option.
Also, even less talked about free agents like Kelly Olynyk, Daniel Theis or Gorgui Dieng present more sensible fits on the team. Worse is that Harrell won't agree to another discounted deal, especially with him having already taken an ample pay cut by signing with Los Angeles in the offseason.