Lindblom will enter camp with the best chance of the group of making the Major League club. He is only 22 with one full professional season under his belt, but he made a completely unexpected run at a roster spot late last spring and has already been mentioned by club officials as in the mix for the fifth-starter job along with Scott Elbert, James McDonald, Eric Stults, Charlie Haeger, Ramon Troncoso and Rule 5 draftee Carlos Monasterios. It's unclear if Lindblom's eventual role will be a starter or reliever.
Mitchell, 25 next month, will enter his seventh professional season with a revived career after a strong Arizona Fall League. He's a corner infielder often compared to Kevin Millar, who could be groomed for a utility role.
Perez, 34, split the 2009 season between the independent Can-Am league's New Jersey and Veracruz of the Mexican League. He has played in the Major Leagues with the Mets, White Sox, Cardinals and Detroit and also in Japan. He last played in the Major Leagues in 2007.
Koronka, 29, spent most of 2009 at Triple-A with two games in the Major Leagues for Florida. He has pitched in the big leagues with Texas and the Cubs.