Jim Kaat vs Bill Singer: Career Stats Comparison
Jim Kaat (1959–1983) and Bill Singer (1964–1977) — breaking in during the 1950s and the 1960s respectively, so they pitched against very different hitting environments. Jim Kaat compiled 283 wins and 2,461 strikeouts; Bill Singer put up 118 wins and 1,515 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Bill Singer
Career Stats Side-by-Side
Every cell below is a career total or career rate. Cells highlighted in green mark the player who leads that line. For pitchers, lower ERA, WHIP, and BB/9 lead; higher K/9 leads.
| Statistic | Jim Kaat | Bill Singer |
|---|---|---|
| Wins | 283 | 118 |
| Losses | 237 | 127 |
| Games | 898 | 322 |
| Games Started | 625 | 308 |
| Complete Games | 180 | 94 |
| Shutouts | 31 | 24 |
| Saves | 18 | 2 |
| Strikeouts | 2,461 | 1,515 |
| Walks | 1,083 | 781 |
| Hits Allowed | 4,620 | 1,952 |
| Home Runs Allowed | 395 | 132 |
| Innings Pitched | 4,530 | 2,174 |
| ERA | 3.45 | 3.39 |
| WHIP | 1.26 | 1.26 |
| K/9 | 4.89 | 6.27 |
| BB/9 | 2.15 | 3.23 |
PIV Comparison
By PIV (Player Impact Value), Jim Kaat leads Bill Singer 26,792 to 24,349 — a gap driven primarily by per-season impact (957 vs 1,623 per year). PIV adjusts each season to league baselines, so it's the cleanest way to compare careers across eras.
Peak Seasons
The best single seasons each player produced, ranked by ERA among qualified workloads (120+ innings).
Jim Kaat — top 3 seasons by ERA (lower is better)
Bill Singer — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Jim Kaat leads in wins, strikeouts, and innings pitched, while Bill Singer owns ERA, WHIP, and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Jim Kaat. PIV agrees: Jim Kaat grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.