"We were messing on the Zoom, myself and [executive vice president of football operations Jack] Easterby and all the guys," O'Brien said. "No, nothing agitating. I didn't ... I thought ... The camera's on the whole time. I don't know.
"We're just messing around on the Zoom. We're on the back patio here. We've done a lot of business on the back patio over the last couple months."
The Houston Chronicle reported that the Texans had a deal with Detroit for that pick, but "the Lions backed out at last instant and Bill O'Brien was furious."
Houston used the No. 90 pick to take outside linebacker Jonathan Greenard of Florida for its second and final selection of the night.
Lions general manager Bob Quinn said after Friday's second and third rounds he wasn't sure what O'Brien was agitated over.
"We talk to a lot of teams. When we're not on the clock, we talk to a bunch of teams and it's not just myself. We've got four or five people that make calls so I'm not sure what that was about," Quinn said. "But yeah, we didn't have a trade."
Quinn said he'd spoken with O'Brien a couple of times throughout the day -- "like I talk to every team" -- but that they didn't have any conversations like that.
ESPN's Michael Rothstein contributed to this report.