| Miguel Batista | rp | Active | Y | 6-2 |
195 |
R-R |
1971-02-19 |
48.289 | Santo Domingo,Dom Rep |
MLB | 1990-2013 | 1992-2012 | 1988- UDFA-MON | Free Agent | | 2012-06-05 | Activated from DL |
| Pedro Beato | rp | Active | Y | 6-5 |
210 |
R-R |
1986-10-27 |
33.039 | Santo Domingo,Dom Rep |
MLB | 2006-2018 | 2011-2017 | 2006- 1- 32-BAL | Free Agent | | 2012-07-04 | Recalled from Buffalo (AAA) |
| Tim Byrdak | rp | Active | Y | 5-11 |
180 |
L-L |
1973-10-31 |
46.035 | Oak Lawn,Illinois |
MLB | 1994-2013 | 1998-2013 | 1994- 5- 135-KCA | Free Agent | | 2012-05-07 | |
| R.A. Dickey | sp | Active | Y | 6-3 |
205 |
R-R |
1974-10-29 |
45.037 | Nashville,Tennessee |
MLB | 1994-2017 | 2001-2017 | 1996- 1- 18-TEX | Free Agent | | 2012-05-07 | |
| Josh Edgin | rp | Active | Y | 6-1 |
225 |
L-L |
1986-12-17 |
32.353 | Florence,South Carolina |
MLB | 2007-2018 | 2012-2017 | 2010-30- 902-NYN | Minors | Washington Nationals (AAA) | 2012-07-13 | Contract purchased from Buffalo (AAA) |
| Frank Francisco | rp | DL-15 | Y | 6-2 |
179 |
R-R |
1980-06-11 |
39.177 | Santo Domingo,Dom Rep |
MLB | 1999-2014 | 2004-2014 | 1996- UDFA-BOS | Free Agent | | 2012-06-24 | DL-15 Left oblique strain |
| Dillon Gee | sp | DL-15 | Y | 6-1 |
195 |
R-R |
1986-04-28 |
33.221 | Cleburne,Texas |
MLB | 2005-2017 | 2010-2017 | 2007-21- 663-NYN | Retired | | 2012-07-13 | DL-15 Damaged artery in right shoulder. |
| Jeremy Hefner | rp-sp | Active | Y | 6-4 |
215 |
R-R |
1986-03-11 |
33.269 | Perkins,Oklahoma |
MLB | 2007-2016 | 2012-2013 | 2007- 5- 177-SDN | Free Agent | | 2012-07-21 | Recalled from Buffalo (AAA) |
| Ryota Igarashi | p | DL-15 | Y | 5-11 |
163 |
R-R |
1979-05-28 |
40.191 | Chiba,Japan |
MLB | 1999-2017 | 2010-2012 | 2009- UDFA-NYN | Free Agent | | 2010-04-21 | DL-15 Left hamstring strain |
| Jon Niese | sp | Active | Y | 6-3 |
190 |
L-L |
1986-10-27 |
33.039 | Defiance,Ohio |
MLB | 2005-2019 | 2008-2016 | 2005- 7- 209-NYN | Free Agent | | 2012-04-04 | Signed to 5-year contract for 2012-2016 ($25.5195m) [Extension] Club options for 2017-2018 at $10m-$11m 0.769--3--5--7--9 |
| Bobby Parnell | cl | Active | Y | 6-3 |
180 |
R-R |
1984-09-08 |
35.088 | Salisbury,North Carolina |
MLB | 2003-2017 | 2008-2016 | 2005- 9- 269-NYN | Free Agent | | 2012-05-07 | |
| Mike Pelfrey | p | DL-60 | N | 6-7 |
190 |
R-R |
1984-01-14 |
35.326 | Wichita,Kansas |
MLB | 2003-2017 | 2006-2017 | 2005- 1- 9-NYN | Free Agent | | 2012-05-07 | Transferred to 60-day DL |
| Ramon Ramirez | rp | Active | Y | 5-11 |
170 |
R-R |
1981-08-31 |
38.096 | Santiago,Dom Rep |
MLB | 2002-2017 | 2006-2014 | 1996- UDFA-TEX | Free Agent | | 2012-06-24 | Activated from DL |
| Jon Rauch | rp | Active | Y | 6-11 |
255 |
R-R |
1978-09-27 |
41.069 | Louisville,Kentucky |
MLB | 1997-2013 | 2002-2013 | 1999- 3- 99-CHA | Free Agent | | 2012-05-07 | |
| Johan Santana | sp | DL-15 | Y | 6-0 |
195 |
L-L |
1979-03-13 |
40.267 | Tovar,Venezuela |
MLB | 1997-2012 | 2000-2012 | 1995- UDFA-HOU | Free Agent | | 2012-07-21 | DL-15 Sprained right ankle |
| Chris Young | sp | Active | Y | 6-10 |
258 |
R-R |
1979-05-25 |
40.194 | Dallas,Texas |
MLB | 2000-2017 | 2004-2017 | 2000- 3- 89-PIT | Free Agent | | 2012-06-08 | Activated from Paternity List |
| Mike Nickeas | c | Active | Y | 6-0 |
205 |
R-R |
1983-02-13 |
36.295 | Vancouver,BC |
MLB | 2002-2014 | 2010-2013 | 2004- 5- 141-TEX | Free Agent | | 2012-05-07 | |
| Josh Thole | c | Active | Y | 6-1 |
190 |
L-R |
1986-10-28 |
33.038 | Breese,Illinois |
MLB | 2005-2019 | 2009-2016 | 2005-13- 389-NYN | Minors | Los Angeles Angels (AAA) | 2012-06-01 | Activated from DL |
| Ronny Cedeno | ss | DL-15 | Y | 6-0 |
170 |
R-R |
1983-02-02 |
36.306 | Carabobo,Venezuela |
MLB | 2001-2015 | 2005-2014 | 1999- UDFA-CHN | Free Agent | | 2012-04-23 | DL-15 Left intercostal strain |
| Ike Davis | 1b | Active | Y | 6-4 |
215 |
L-L |
1987-03-22 |
32.258 | Edina,Minnesota |
MLB | 2006-2017 | 2010-2016 | 2008- 1- 18-NYN | Free Agent | | 2012-05-07 | |
| Scott Hairston | 2b | Active | Y | 6-0 |
190 |
R-R |
1980-05-25 |
39.194 | Fort Worth,Texas |
MLB | 2000-2014 | 2004-2014 | 2001- 3- 98-ARI | Free Agent | | 2012-05-07 | |
| Daniel Murphy | 2b | Active | Y | 6-1 |
215 |
L-R |
1985-04-01 |
34.248 | Jacksonville,Florida |
MLB | 2004-2019 | 2008-2019 | 2006-13- 394-NYN | Active | Colorado Rockies (MLB) | 2011-10-24 | Activated from DL |
| Ruben Tejada | ss | Active | Y | 5-11 |
162 |
R-R |
1989-10-27 |
30.039 | Veraguas,Panama |
MLB | 2007-2019 | 2010-2019 | 2006- UDFA-NYN | Minors | New York Mets (AAA) | 2012-06-24 | Activated from DL |
| Justin Turner | ss-2b | Active | Y | 5-11 |
180 |
R-R |
1984-11-23 |
35.012 | Long Beach,California |
MLB | 2003-2019 | 2009-2019 | 2006- 7- 204-CIN | Active | Los Angeles Dodgers (MLB) | 2012-06-16 | Activated from DL |
| David Wright | 3b | Active | Y | 6-0 |
195 |
R-R |
1982-12-20 |
36.350 | Norfolk,Virginia |
MLB | 2001-2018 | 2004-2018 | 2001- 1- 38-NYN | Free Agent | | 2012-05-07 | |
| Jason Bay | lf | Active | Y | 6-2 |
200 |
R-R |
1978-09-20 |
41.076 | Trail,BC |
MLB | 1999-2013 | 2003-2013 | 2000-22- 645-MON | Free Agent | | 2012-07-17 | Activated from DL |
| Lucas Duda | rf | Active | Y | 6-4 |
225 |
L-R |
1986-02-03 |
33.305 | Fontana,California |
MLB | 2005-2019 | 2010-2019 | 2007- 7- 243-NYN | Free Agent | | 2012-03-04 | Signed to 1-year contract for 2012-2012 ($0.497318) |
| Kirk Nieuwenhuis | cf-rf | Active | Y | 6-3 |
210 |
L-R |
1987-08-07 |
32.120 | Santa Maria,California |
MLB | 2008-2018 | 2012-2017 | 2008- 3- 100-NYN | Free Agent | | 2012-05-07 | |
| Andres Torres | cf | Active | Y | 5-10 |
175 |
B-R |
1978-01-26 |
41.313 | Aguadilla,Puerto Rico |
MLB | 1998-2014 | 2002-2013 | 1998- 4- 117-DET | Free Agent | | 2012-05-07 | |
| Jordany Valdespin | lf | Active | Y | 5-10 |
150 |
L-R |
1987-12-23 |
31.348 | San Pedro de Mac,Dom Rep |
MLB | 2008-2019 | 2012-2015 | 2007- UDFA-NYN | Minors | Minnesota Twins (AAA) | 2012-07-04 | Recalled from Buffalo (AAA) |
