My wrists are generally fine and I never had a serious problem through an entire year of jazz bass play. Recently, however, I've been getting pretty bad pain, and I think I can pare the possibilities to a particular pain producing passage.

I think I must be doing my pull-offs wrong in this one particular passage of a piece I'm preparing, because out of everything I've been practicing lately, this is the one that hurts the most to play post-injured wrist.
----454--
--5----5-
---------
3--------

where each "-" counts as a 16th note at 120 bpm and the 3 is fretted and allowed to ring through the whole section

Any suggestions on how I can play this in a way that has less impact on my wrist?

Hammer-ons and pull-offs can hurt a sore wrist more because you don't have your right hand to do the work of sounding out the string. If I were you, I'd be looking around for a doctor who specializes in sports and music injuries. And if you haven't already, find yourself a good bass teacher who can show you more ergonomic ways of playing.

Always do some stretching exercises before picking up the bass. It really helps.

Check your wrist position. The more straight your wrists are, the less likely you are to have pain. Of course, once you've got things inflamed, it might hurt no matter what you do until you give it a rest/ice/anti-inflammatories.

Getting straight wrists might require some adjustment to your bass position relative to your body and your strap height - even perhaps into positions that some would say make your hand positions "incorrect."