On Monday, Kubiak said he liked what he saw from Keenum.
"Matt's health is fine," Kubiak said of his QB decision. "It's a decision based on what I saw take place this week with Case."
Before Kubiak's announcement, NFL Media Insider Ian Rapoport reported Monday that Schaub had torn ankle ligaments that he would attempt to play through, according to two sources informed of the injury.
One source said Schaub might not be "right" all season.
(Some fans surely will argue he wasn't "right" even when healthy.)
Given how this season has gone for the Texans, it makes sense for Kubiak to find out what Keenum brings to the table.