Dilfer, who won a Super Bowl with the Baltimore Ravens, said a recent injury to his Achilles' tendon helped make up his mind.
"I was going to retire anyway. This just gives clarity to the
situation," he said during a news conference for American Century
Celebrity Golf Championship that begins Friday at Lake Tahoe.
The 36-year-old Dilfer said he's been considering some different
options post-football but declined to elaborate.
"I think in the next few days there will be a formal
announcement on all those things," he said. "I think everybody
I've talked to says [camaraderie is] the hardest thing to get away
from, just the locker room, just being around the guys each day,
the routine of the season. But I knew this time was coming, and
here it is."