| Batters - 24 | ||
|---|---|---|
| Pos | Player | Age |
| LF | Paul McAnulty | 28 |
| SS | David Eckstein | 34 |
| 1B | Gabriel Martinez | 25 |
| SS | Matt Shepherd | 25 |
| RF | Jake Ritchie | 28 |
| SS | Ricardo Bonfante | 20 |
| CF | Palmer Karr | 26 |
| 3B | Angel Berroa | 31 |
| LF | Derry Hammond | 29 |
| C | Toby Hall | 33 |
| 2B | Matt Antonelli | 24 |
| LF | Chris W. Carter | 26 |
| 1B | Edwin Encarnacion | 26 |
| LF | Chris Burke | 29 |
| C | Bo Hundt | 33 |
| 1B | Joey Votto (AAA) | 25 |
| 1B | Mike Eylward (AAA) | 29 |
| LF | R.T. Plumsky (AAA) | 25 |
| CF | Jason Pridie (AA) | 25 |
| SS | Joseph Mihalics (AA) | 26 |
| RF | Sergio Pedroza (AAA) | 25 |
| 3B | Donnie Hood (AA) | 30 |
| C | Matt Lauderdale (AA) | 28 |
| C | Edwin Bellorin (AAA) | 27 |
| Pitchers - 15 | ||
|---|---|---|
| Pos | Player | Age |
| RP | Ross Ohlendorf | 26 |
| SP | Casey Kelly | 19 |
| RP | David Huff | 24 |
| SP | Jordan Zimmermann | 22 |
| SP | Greg Smith | 25 |
| RP | Dallas Braden | 25 |
| RP | Jeff Marquez | 24 |
| RP | Eric Wordekemper | 25 |
| RP | Phil Hughes | 22 |
| CL | Jeff Davis | 36 |
| RP | Vicente Padilla | 31 |
| SP | Clayton Kershaw | 21 |
| SP | Chris Nicoll | 25 |
| RP | Clint Goocher | 26 |
| RP | Joe Salas (AAA) | 27 |