The team has signed pitcher Matt Riley, infielder David Newhan and outfielder Bobby Kielty to Minor League contracts.
The deals do not include invitations to Major League camp in Spring Training.
Minor League pitchers and catchers report to the Peoria Sports Complex in Arizona on March 4. Position players report on March 11.
Riley, 31, is a left-handed pitcher who is 5-4 with a 5.99 ERA in parts of four seasons with the Orioles (1999, 2003-04) and Rangers (2005).
Riley spent last season with York of the independent Atlantic League, going 4-1 with a 5.87 ERA. Riley was also 1-0 and didn't allow an earned run in six games with Orange County of the Golden Baseball League.
Newhan, 37, is a career .253 hitter over parts of eight Major League seasons. He played for the Padres from 1999-2000, Phillies (2000-01), Orioles (2004-06), Mets (2007) and Astros (2008).
Newhan did not play last season.
Kielty, 34, is a career .254 hitter over seven Major League seasons with the Twins (2001-03), Blue Jays (2003), A's (2004-07) and Red Sox (2007). He hasn't appeared in the big leagues since 2007.
Kielty attempted to reinvent himself as a pitcher last spring but found no takers. The Padres confirmed that he'll report to Spring Training in March as an outfielder.