"Oh definitely (it's stunning)," the Texan told KRIV-TV on Monday. "It's devastating. We wish he could be out there with us.
"During the game, I saw him limping a little bit, and you know, he said he was fine. He kept playing. To come in and hear that (Monday), it was like 'Wow,' because he went out and finished playing the game.
"Now you're hearing rumors that it's possible he could miss the rest of the season and things like that. It's kind of like, 'Where did all that come from?' "
Kubiak said Monday that Schaub was injured on a quarterback sneak coming out of the end zone late during the second quarter against the Bucs, and the Houston Chronicle reported Schaub is hopeful a second opinion on the injury will help him avoid a possible season-ending surgery to repair the Lisfranc joint in his right foot.
"It just kind of feels like we can't catch a break," Johnson said. "I was more excited about me coming back, and then you get some bad news like that. It's just something we'll have to deal with. Hopefully Matt won't miss the whole season."
"I feel pretty good," Johnson said. "I went out and ran routes (Monday) morning. Everything went well, didn't feel anything bothering me. (Tuesday) I'll go out and run some longer routes, a lot of deep balls and stuff like that and see how that goes.
"I expect to be on the field next week against Jacksonville."