When former Orioles and A’s closer Jim Johnson worked out Monday in Florida, there were reports that he did not sign with his old team, the O’s, but rather with a mystery team.

Mystery solved, as Fox Sports’ Ken Rosenthal reported that the Detroit Tigers were the mystery team, signing him to a minor-league deal, according to a source.

[UPDATED: The Tigers think Johnson is a risk worth taking.]

Johnson saved 101 games for Baltimore in 2012-13, earning an All-Star bid the first of those two seasons, as well as Cy Young and MVP votes.

In the offseason, he was traded to Oakland for Jemile Weeks and David Freitas, then struggled to a 7.14 ERA and just two saves before being released on Aug. 1. (His other stats: 2.058 WHIP, 5.30 FIP, 13.4 hits/9, 5.1 walks/9, 6.2 K/9)

The 31-year-old was due $10 million from the A’s this year, but couldn’t hold the closing job, losing it to Sean Doolittle early in the season. He would be owed only the pro-rated portion of the veteran’s minimum from the Tigers, making it a low-risk, potential high-reward move, if he could figure it out.