The 30-year-old Collazo spent last season in the Marlins' system, posting an 8-5 record with a 3.85 ERA for Triple-A New Orleans. Collazo appeared in six big league games with the Mets in 2007, finishing with a 6.35 ERA out of New York's bullpen that season.
Padilla, 30, hit .367 with four home runs, 21 RBIs and 14 stolen bases for Triple-A Syracuse in the Nationals' organization in 2009. He appeared in 29 Major League games last season, hitting .129 in those contests. Padilla has hit .289 over 12 Minor League seasons.
The 24-year-old Lubanski was the Roayls' top pick and fifth overall selection in the 2003 First-Year Player Draft. Over 715 career games, he has hit .278 with 91 homers, including a career-best 28 homers for Class A High Desert in '05.
Jordan Bastian is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.