Haden sat out the Browns' 30-27 loss with a broken right ring finger, an injury he had suffered a week earlier against Oakland. Haden also hurt his ribs but was able to practice on a limited basis all week and was listed as probable -- a 75 percent chance of playing -- on the week's final injury report.
However, after testing his hand during a pregame workout, Haden decided not to play. Browns coach Mike Pettine said Monday that "we left it up to Joe, and he made the decision that he didn't want to go.''
Trainers wrapped and padded the finger -- the team has not specified which -- before the game in San Diego. Haden tested it early, then told the team he could not play.
A league spokesman says it's customary to check with teams when these instances occur. The Browns are required to submit a written explanation for Haden's absence.
With Haden out, Pierre Desir started and Pettine admitted that "we didn't plan on him having as big a role in the game as he did."
As for next Sunday in Baltimore, Pettine said he would wait to see with Haden.
"Hopefully Joe will get more comfortable with the finger injury so we can get him back out there," Pettine said.
ESPN's Pat McManamon and The Associated Press contributed to this report.
Joe Haden's last minute status switch has NFL asking questions
ESPN NFL Insider Dan Graziano discusses why the integrity of the injury report is causing the league to check with the Browns about why cornerback Joe Haden sat out Sunday's game after being listed as probable.