Diaz went 2-for-4 with a double and a run scored in Saturday's 7-5 win over the Dodgers.
Diaz was an igniter for the Astros' five-run ninth-inning rally in the comeback win. He's been a lineup regular while Astros manager Dusty Baker has navigated injuries to Alex Bregman (hamstring) and Jose Altuve (knee). Richard Justice of MLB.com reported that Altuve took swings Saturday and was scheduled to run the bases, and the Astros are hopeful he'll be activated for Tuesday's series opener against the Rangers. With Bregman already having returned and Altuve close, Diaz's time as an everyday starter could be ending Sunday.