The Eagles promoted safety Keelan Johnson from the practice squad on Tuesday.
Johnson said he was so confident about his future in Philadelphia that he declined an appealing offer elsewhere because he felt his time would come with the Eagles.
"I spent all this time here, I figured it was going to happen sooner or later," said Johnson, who played for Arizona State.
The Cardinals were interested in adding Johnson after safety Tyrann Mathieu hurt his knee on Dec. 8. Johnson would have been guaranteed a roster spot for four weeks and credited for an accrued season.
But Johnson had been with the Eagles for more than three months, learned the defense, and was confident that he'd have a better chance of excelling in Philadelphia. He didn't know when it was going to happen, but injuries to Colt Anderson and Kurt Coleman in Sunday's loss to Minnesota prompted the Eagles to make a move.