"He's a great guy," Maddon said. "I was there for his 300th save in Texas. It's always good to add pitching depth. You can never have enough pitching depth. I think it's a great move and hopefully he'll be well."
Nathan, 41, will report to the Cubs' complex in Mesa, Ariz., to continue his rehab. He wasn't expected to be game-ready until July. He will make the Major League minimum, and the salary will be prorated. There also are performance clauses in his contract.
A six-time All-Star, Nathan has 377 saves, eighth-most in Major League history, in 15 seasons with the Giants, (1999-2000, 2002-03), Twins (2004-09, 2011), Rangers (2012-13) and Tigers (2014-15). He surpassed 30 saves in nine of 10 seasons from 2004-14, including four seasons with more than 40 saves.
Nathan made one appearance with the Tigers last year on April 6 and struck out Torii Hunter on four pitches before he was sidelined with elbow problems.
Carrie Muskat has covered the Cubs since 1987, and for MLB.com since 2001. She writes a blog, Muskat Ramblings. You can follow her on Twitter @CarrieMuskat and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.