P · 14 seasons · 1999 – 2012 · B/T: B/L
J. C. Romero is the extreme version of a specialist. +1.5 of roto value came from ERA, yet his career total is only -14.4. No season of his scores higher than 2002, at +4.0, 81st that season and 7063rd of 51,303 player-seasons on record. On the credit side, ERA (+1.5). On the debit side, WHIP (-4.7), strikeouts (-3.9) and saves (-2.9).
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1999 | MIN | 5 | -2.15 | #602 | #71,823 |
| 2000 | MIN | 12 | -2.15 | #628 | #71,471 |
| 2001★ | MIN | 14 | -2.03 | #552 | #55,462 |
| 2002 | MIN | 81 | -2.15 | #594 | #72,185 |
| 2003 | MIN | 73 | -2.16 | #894 | #73,320 |
| 2004 | MIN | 74 | -2.12 | #583 | #67,132 |
| 2005 | MIN | 68 | -2.10 | #572 | #64,808 |
| 2006 | LAA | 65 | -2.08 | #573 | #62,707 |
| 2007 | PHI | 74 | -2.11 | #949 | #65,414 |
| 2008 | PHI | 81 | -2.06 | #590 | #59,565 |
| 2009 | PHI | 21 | -2.10 | #571 | #64,345 |
| 2010 | PHI | 60 | -2.12 | #582 | #67,547 |
| 2011 | PHI | 36 | -2.11 | #611 | #65,863 |
| 2012 | STL | 16 | -2.13 | #610 | #68,982 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1999 | MIN | 5 | -2.01 | #374 | #31,779 |
| 2000 | MIN | 12 | -2.91 | #534 | #44,355 |
| 2001 | MIN | 14 | -2.76 | #497 | #42,731 |
| 2002★ | MIN | 81 | 4.03 | #81 | #7,063 |
| 2003 | MIN | 73 | -2.23 | #438 | #35,124 |
| 2004 | MIN | 74 | 1.97 | #135 | #11,670 |
| 2005 | MIN | 68 | -0.49 | #239 | #20,705 |
| 2006 | LAA | 65 | -3.43 | #598 | #48,090 |
| 2007 | PHI | 74 | 0.89 | #182 | #15,019 |
| 2008 | PHI | 81 | 1.10 | #175 | #14,324 |
| 2009 | PHI | 21 | -1.80 | #395 | #29,213 |
| 2010 | PHI | 60 | -1.38 | #325 | #25,778 |
| 2011 | PHI | 36 | -2.15 | #473 | #33,820 |
| 2012 | STL | 16 | -3.28 | #621 | #47,271 |
★ Best season by Z