Mientkiewicz, who will wear No. 26, signed a minor league contract with an invitation to Major League Spring Training on February 26. He batted .268 (11-for-41) with four doubles, three homers, and 13 RBI in 23 spring games.
Ohman, who will wear No. 43, signed a minor league contract with Major League terms on Tuesday. The deal includes a club option for 2010. Ohman appeared in three Spring Training games, working a combined 1.0 inning and allowing two runs and one hit.
Belisario, who will wear No. 54, made four Spring Training appearances, tossing 6.0 scoreless innings with four strikeouts. He had been reassigned to minor league camp on March 6 without making an appearance in a Cactus League game. He then rejoined the big league club on March 30. Belisario was signed by the Dodgers as a minor league free agent on January 13.
Miller has gone 24-13 with a 3.76 ERA in 183 games (52 starts) in six minor league seasons since being selected by the Dodgers in the sandwich round (31st overall) of the 2002 First-Year Player Draft.
He went just 4-6 with a 6.63 ERA in a combined 82 games with Double-A Jacksonville and Triple-A Las Vegas from 2007-08. He also walked 152 batters in 130.1 innings of work in that two-year span.
The Dodgers' 25-man roster for today's season-opening game at San Diego:
b> Pitchers (12): Ronald Belisario Chad Billingsley Jonathan Broxton Clayton Kershaw (L) Hiroki Kuroda Hong-Chih Kuo (L) James McDonald Guillermo Mota Will Ohman (L) Ramon Troncoso Cory Wade Randy Wolf (L) Catchers (2): Brad Ausmus Russell Martin Infielders (7): Casey Blake Blake DeWitt Rafael Furcal Orlando Hudson James Loney Mark Loretta Doug Mientkiewicz Outfielders (4): Andre Ethier Matt Kemp Juan Pierre Manny Ramirez 15-day disabled list (2): Jason Schmidt Delwyn Young