Roger Clemens vs Jon Lieber: Career Stats Comparison
Roger Clemens (1984–2007) and Jon Lieber (1994–2008) — breaking in during the 1980s and the 1990s respectively, so they pitched against very different hitting environments. Roger Clemens compiled 354 wins and 4,672 strikeouts; Jon Lieber put up 131 wins and 1,553 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Roger Clemens
Jon Lieber
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 | Roger Clemens | Jon Lieber |
|---|---|---|
| Wins | 354 | 131 |
| Losses | 184 | 124 |
| Games | 709 | 401 |
| Games Started | 707 | 327 |
| Complete Games | 118 | 25 |
| Shutouts | 46 | 5 |
| Saves | 0 | 2 |
| Strikeouts | 4,672 | 1,553 |
| Walks | 1,580 | 422 |
| Hits Allowed | 4,185 | 2,388 |
| Home Runs Allowed | 363 | 285 |
| Innings Pitched | 4,916 | 2,198 |
| ERA | 3.12 | 4.27 |
| WHIP | 1.17 | 1.28 |
| K/9 | 8.55 | 6.36 |
| BB/9 | 2.89 | 1.73 |
PIV Comparison
By PIV (Player Impact Value), Roger Clemens outpaces Jon Lieber 146,187 to 27,226 — a gap driven primarily by per-season impact (6,091 vs 1,945 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).
Roger Clemens — top 3 seasons by ERA (lower is better)
Jon Lieber — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Roger Clemens leads in wins, strikeouts, ERA, and WHIP, while Jon Lieber owns no headline categories. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Roger Clemens. PIV agrees: Roger Clemens grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.