With Yanier in lineup: 4th in runs scored. Not in lineup: 17th

I did a bit of research, and in games where Diaz had at least 3 plate appearances, the Astros scored 331 runs in 62 games for an average of 5.34 runs per game, which would put them 4th behind Atlanta (5.71), Texas (5.70), and the Dodgers (5.67).

Without Diaz in the lineup, or only a single plate appearance, the Astros scored 248 runs in 56 games, for an average of 4.43 runs per game, which would put them 17th in the league.