I mean, I've been out of baseball for awhile and it seems that is what they are looking for - players who haven't played in the majors last year and beyond.
From the article:
The 43-year-old Rhodes, who still lives in Baltimore, worked out at Camden Yards on Thursday. Once a hard-throwing starter who made his major league debut with the Orioles in 1991 at age 21, Rhodes became a reliever full-time in 1997. He stayed in that relief role throughout the rest of his career and pitched until 2011, when he won a championship with the St. Louis Cardinals.
38-year old Tatis - He hasnít played in the majors since July 2010 with the New York Mets. In his career, the right-handed hitting corner infielder and outfielder has batted .265 with a .344 on-base percentage. He is a career .271 hitter against lefties.
I have been out of baseball a lot longer than that, although, admittedly, I never played in the majors or minors.