Has anyone ever retired and unretired in the same season?
Junior Seau in 2006, announced his retirement, then signed with the Pats in less than a week.
Allen Iverson in 2009, it was reported he was retiring and then signed with the Sixers about a week later.
Then you got guys like Roger Clemens and Brett Favre. Act retired, do nothing all off season, then at the least minute or even after the season starts decide they don't want to be retired and sign somewhere. Kind of like PJ Brown in 2008.
Though in a lot of these examples (like Seau, Iverson), the retirement ended when a better team/situation presented itself. Dooling would be coming back to the same situation/team he left.