The Marlins have designated outfielder Jai Miller and righthander Cristhian Martinez for assignment, tweets MLB.com's Joe Frisaro. The moves open up 40-man roster spots for Mike Lamb and Jose Veras.
The 25-year-old Miller has one big league plate appearance to his credit, coming back in 2008. He's a .277/.354/.489 hitter in 888 Triple-A plate appearances, and is a threat to steal once he reaches base.
Martinez, 28, posted a 5.13 ERA and a 6.2 K/9 with a 2.7 BB/9 in 26.1 innings of relief for the Marlins last year. He's never spent a day in Triple-A, but his minor league walk rate is impressive at 1.8 BB/9.
