| SP | Buchholz, C.Buchholz, Clay >> | 29 | 2013 | R | 93 | 12 | 1 | 1.74 | .249 | .310 | 1.03 | 6.3 | 3.0 | 8.0 | 108 | 75 | 4 | 36 | 96 | 1 | 0 | 1 | 119 | 18 | C |
| SP | Wacha, M.Wacha, Michael >> | 21 | 2013 | R | 70 | 4 | 1 | 2.78 | .260 | .320 | 1.11 | 7.3 | 2.7 | 9.1 | 64 | 52 | 5 | 19 | 65 | 0 | 0 | 3 | 77 | 19 | C |
| SP | Wainwright, A.Wainwright, Adam >> | 32 | 2013 | R | 58 | 19 | 9 | 2.94 | .260 | .320 | 1.07 | 8.3 | 1.3 | 8.2 | 241 | 223 | 15 | 35 | 219 | 5 | 0 | 5 | 124 | 18 | C |
| SP | Peavy, J.Peavy, Jake >> | 32 | 2013 | R | 41 | 12 | 5 | 4.17 | .273 | .330 | 1.15 | 8.1 | 2.3 | 7.6 | 144 | 130 | 20 | 36 | 121 | 2 | 0 | 0 | 110 | 17 | C |
| SP | Miller, S.Miller, Shelby >> | 22 | 2013 | R | 39 | 15 | 9 | 3.06 | .283 | .340 | 1.21 | 7.9 | 3.0 | 8.8 | 173 | 152 | 20 | 57 | 169 | 1 | 0 | 2 | 99 | 18 | C |
| RP | Uehara, K.Uehara, Koji >> | 38 | 2013 | R | 100 | 4 | 1 | 1.09 | .153 | .210 | 0.57 | 4.0 | 1.1 | 12.3 | 74 | 33 | 5 | 9 | 101 | 0 | 21 | 1 | 23 | 22 | C |
| RP | Siegrist, K.Siegrist, Kevin >> | 23 | 2013 | L | 98 | 3 | 1 | 0.45 | .216 | .290 | 0.90 | 3.9 | 4.2 | 11.5 | 39 | 17 | 1 | 18 | 50 | 0 | 0 | 0 | 23 | 22 | C |
| RP | Choate, R.Choate, Randy >> | 38 | 2013 | L | 69 | 2 | 1 | 2.29 | .243 | .320 | 1.06 | 6.7 | 2.8 | 7.2 | 35 | 26 | 0 | 11 | 28 | 0 | 0 | 0 | 23 | 19 | C |
| RP | Rosenthal, T.Rosenthal, Trevor >> | 23 | 2013 | R | 54 | 2 | 4 | 2.63 | .261 | .320 | 1.11 | 7.6 | 2.4 | 13.0 | 75 | 63 | 4 | 20 | 108 | 0 | 3 | 3 | 23 | 23 | C |
| RP | Mujica, E.Mujica, Edward >> | 29 | 2013 | R | 52 | 2 | 1 | 2.78 | .243 | .310 | 1.02 | 8.4 | 0.7 | 6.5 | 64 | 60 | 9 | 5 | 46 | 0 | 37 | 0 | 23 | 16 | C |
| RP | Breslow, C.Breslow, Craig >> | 33 | 2013 | L | 42 | 5 | 2 | 1.81 | .264 | .330 | 1.14 | 7.5 | 2.7 | 5.0 | 59 | 49 | 3 | 18 | 33 | 0 | 0 | 2 | 23 | 15 | C |
| RP | Bailey, A.Bailey, Andrew >> | 29 | 2013 | R | 37 | 3 | 1 | 3.77 | .271 | .350 | 1.25 | 7.4 | 3.9 | 12.5 | 28 | 23 | 7 | 12 | 39 | 0 | 8 | 0 | 23 | 23 | C |
| RP | Miller, A.Miller, Andrew >> | 28 | 2013 | L | 26 | 1 | 2 | 2.64 | .296 | .370 | 1.40 | 7.5 | 5.1 | 14.4 | 30 | 25 | 3 | 17 | 48 | 0 | 0 | 2 | 23 | 26 | C |
| RP | Axford, J.Axford, John >> | 30 | 2013 | R | 7 | 7 | 7 | 4.02 | .326 | .390 | 1.52 | 10.1 | 3.6 | 9.0 | 65 | 73 | 10 | 26 | 65 | 0 | 0 | 5 | 23 | 19 | C |
| SP | Westbrook, J.Westbrook, Jake >> | 36 | 2013 | R | 2 | 7 | 8 | 4.63 | .337 | .400 | 1.57 | 10.2 | 3.9 | 3.4 | 116 | 132 | 7 | 50 | 44 | 1 | 0 | 1 | 98 | 13 | C |
| RP | Martinez, C.Martinez, Carlos >> | 22 | 2013 | R | 7 | 2 | 1 | 5.08 | .299 | .380 | 1.43 | 10.0 | 2.9 | 7.7 | 28 | 31 | 1 | 9 | 24 | 0 | 1 | 0 | 27 | 18 | C |
| RP | Rzepczynski, M.Rzepczynski, Marc >> | 27 | 2013 | L | 23 | 0 | 0 | 3.23 | .270 | .350 | 1.23 | 8.1 | 3.0 | 8.7 | 30 | 27 | 2 | 10 | 29 | 0 | 0 | 0 | 23 | 19 | C |
| SP | Kelly, J.Kelly, Joe >> | 25 | 2013 | R | 10 | 10 | 5 | 2.69 | .305 | .370 | 1.35 | 9.0 | 3.2 | 5.7 | 124 | 124 | 10 | 44 | 79 | 0 | 0 | 3 | 61 | 16 | C |
| SP | Webster, A.Webster, Allen >> | 23 | 2013 | R | 5 | 1 | 2 | 8.60 | .355 | .430 | 1.83 | 11.1 | 5.4 | 6.9 | 30 | 37 | 7 | 18 | 23 | 0 | 0 | 1 | 68 | 17 | C |
| RP | Wilson, A.Wilson, Alex >> | 26 | 2013 | R | 2 | 1 | 1 | 4.88 | .345 | .430 | 1.78 | 11.3 | 4.7 | 7.3 | 27 | 34 | 0 | 14 | 22 | 0 | 0 | 1 | 23 | 17 | C |
| RP | Mortensen, C.Mortensen, Clayton >> | 28 | 2013 | R | 3 | 1 | 2 | 5.34 | .324 | .400 | 1.60 | 9.6 | 4.8 | 6.3 | 30 | 32 | 3 | 16 | 21 | 0 | 0 | 1 | 25 | 17 | C |
| SP | Garcia, J.Garcia, Jaime >> | 27 | 2013 | L | 13 | 5 | 2 | 3.58 | .291 | .360 | 1.31 | 9.3 | 2.5 | 7.0 | 55 | 57 | 6 | 15 | 43 | 0 | 0 | 3 | 108 | 17 | C |
| RP | Tazawa, J.Tazawa, Junichi >> | 27 | 2013 | R | 24 | 5 | 4 | 3.16 | .277 | .340 | 1.21 | 9.3 | 1.6 | 9.5 | 68 | 70 | 9 | 12 | 72 | 0 | 0 | 3 | 23 | 20 | C |
| SP | Dempster, R.Dempster, Ryan >> | 36 | 2013 | R | 12 | 8 | 9 | 4.57 | .323 | .380 | 1.46 | 8.9 | 4.2 | 8.3 | 171 | 170 | 26 | 79 | 157 | 0 | 0 | 9 | 95 | 18 | C |
| SP | Lynn, L.Lynn, Lance >> | 26 | 2013 | R | 20 | 15 | 10 | 3.97 | .302 | .360 | 1.32 | 8.5 | 3.4 | 8.9 | 201 | 189 | 14 | 76 | 198 | 0 | 0 | 6 | 108 | 19 | C |
| SP | Doubront, F.Doubront, Felix >> | 25 | 2013 | L | 12 | 11 | 6 | 4.32 | .319 | .380 | 1.43 | 8.9 | 3.9 | 7.7 | 162 | 161 | 13 | 71 | 139 | 0 | 0 | 8 | 99 | 17 | C |
| RP | Workman, B.Workman, Brandon >> | 24 | 2013 | R | 10 | 6 | 3 | 4.97 | .307 | .380 | 1.44 | 9.7 | 3.3 | 10.3 | 41 | 44 | 5 | 15 | 47 | 0 | 0 | 1 | 39 | 21 | C |
| SP | Lyons, T.Lyons, Tyler >> | 25 | 2013 | L | 26 | 2 | 4 | 4.75 | .278 | .350 | 1.23 | 8.3 | 2.7 | 7.3 | 53 | 49 | 5 | 16 | 43 | 0 | 0 | 0 | 79 | 18 | C |
| RP | Thornton, M.Thornton, Matt >> | 37 | 2013 | L | 5 | 0 | 4 | 3.74 | .308 | .380 | 1.44 | 9.8 | 3.1 | 6.3 | 43 | 47 | 4 | 15 | 30 | 0 | 0 | 2 | 23 | 17 | C |
| RP | Salas, F.Salas, Fernando >> | 28 | 2013 | R | 25 | 0 | 3 | 4.50 | .260 | .340 | 1.18 | 8.7 | 1.9 | 7.1 | 28 | 27 | 3 | 6 | 22 | 0 | 0 | 2 | 23 | 17 | C |
| SP | Lackey, J.Lackey, John >> | 35 | 2013 | R | 34 | 10 | 13 | 3.52 | .275 | .330 | 1.16 | 8.5 | 1.9 | 7.7 | 189 | 179 | 26 | 40 | 161 | 2 | 0 | 4 | 115 | 17 | C |
| SP | Lester, J.Lester, Jon >> | 29 | 2013 | L | 17 | 15 | 8 | 3.75 | .298 | .360 | 1.30 | 8.8 | 2.8 | 7.5 | 213 | 209 | 19 | 67 | 177 | 1 | 0 | 5 | 114 | 17 | C |
| RP | Maness, S.Maness, Seth >> | 24 | 2013 | R | 11 | 5 | 2 | 2.32 | .285 | .350 | 1.26 | 9.4 | 1.9 | 5.1 | 62 | 65 | 4 | 13 | 35 | 0 | 1 | 2 | 23 | 15 | C |
| RP | Morales, F.Morales, Franklin >> | 27 | 2013 | L | 8 | 2 | 2 | 4.62 | .315 | .400 | 1.56 | 8.6 | 5.4 | 7.6 | 25 | 24 | 2 | 15 | 21 | 0 | 0 | 3 | 25 | 20 | C |
| SP | Aceves, A.Aceves, Alfredo >> | 31 | 2013 | R | 5 | 4 | 1 | 4.86 | .346 | .420 | 1.73 | 10.2 | 5.4 | 5.8 | 37 | 42 | 8 | 22 | 24 | 0 | 0 | 0 | 61 | 16 | C |