Jon Matlack vs Fernando Valenzuela: Career Stats Comparison
Jon Matlack (1971–1983) and Fernando Valenzuela (1980–1997) — breaking in during the 1970s and the 1980s respectively, so they pitched against very different hitting environments. Jon Matlack compiled 125 wins and 1,516 strikeouts; Fernando Valenzuela put up 173 wins and 2,074 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Jon Matlack
Fernando Valenzuela
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 | Jon Matlack | Fernando Valenzuela |
|---|---|---|
| Wins | 125 | 173 |
| Losses | 126 | 153 |
| Games | 361 | 453 |
| Games Started | 318 | 424 |
| Complete Games | 97 | 113 |
| Shutouts | 30 | 31 |
| Saves | 3 | 2 |
| Strikeouts | 1,516 | 2,074 |
| Walks | 638 | 1,151 |
| Hits Allowed | 2,276 | 2,718 |
| Home Runs Allowed | 161 | 226 |
| Innings Pitched | 2,363 | 2,930 |
| ERA | 3.18 | 3.54 |
| WHIP | 1.23 | 1.32 |
| K/9 | 5.77 | 6.37 |
| BB/9 | 2.43 | 3.54 |
PIV Comparison
By PIV (Player Impact Value), Jon Matlack leads Fernando Valenzuela 38,811 to 30,102 — a gap driven primarily by per-season impact (2,985 vs 1,672 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).
Jon Matlack — top 3 seasons by ERA (lower is better)
Fernando Valenzuela — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Fernando Valenzuela leads in wins, strikeouts, K/9, and innings pitched, while Jon Matlack owns ERA and WHIP. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Fernando Valenzuela. Note that PIV actually grades Jon Matlack ahead, which means Fernando Valenzuela's edge is partly volume. Click through to each profile for the full season-by-season breakdown.