Hundley was hoping it wouldn't amount to much, though he discovered otherwise when he awoke Thursday morning.
"I woke up yesterday and I had felt it," Hundley said. "I feel it moving around, turning over in your sleep, waking up in the middle of the night, stuff like that. I knew it was bad [Thursday morning]."
Hundley had treatment at PETCO Park on Thursday, but another restless night of sleep -- and considerable pain -- eventually landed him on the 15-day disabled list on Friday with a strain of the right oblique.
"I was optimistic about it until I woke up today and it was the exact same," Hundley said.
Taking the safe route, the Padres placed Hundley on the DL and purchased the contract of catcher Kyle Phillips from Double-A San Antonio.
Hundley, who was hitting .263 and was the only regular hitting above .260, said that he was disappointed but was trying to remain pragmatic about his injury.
"It would just be unfair to the team if I wouldn't be able to go," he said. "I think that's the main thing now is if I were to play in a couple of days, there's a risk of making it a lot worse. So let's nip it in the bud now.
"Obviously, it's really disappointing, but at the same time, I can look myself in the mirror and I can say that I physically gave myself the best chance I could have to be healthy to catch every day. And this little setback here in May, hopefully we're not thinking about it all in September."
Hundley has started 24 of the Padres' first 31 games this season with Rob Johnson -- who figures to get the bulk of the catching duties -- starting the other seven games.