DataBaseball
2026

Head to head · Career pitching

Jon Lester vs Aaron Nola

In 2021 Aaron Nola has been worth 4.3 more wins. Both lines are computed from play-by-play on the same constants, so they are measured the same way rather than quoted from two sources.

Career

Totalled over the seasons published here, which is not the same as a whole career: a player who debuted before 2005 begins at 2005, not at his real first game.

Career pitching totals. ERA, WHIP and the per-nine rates are recomputed from the components rather than averaged; FIP needs each season’s own constant and is left to the season table.
StatisticJon LesterAaron Nola
G452318
GS451318
IP2,740.01,891.0
W200116
L117101
SV00
SO2,4882,053
BB892508
ERA3.663.91
WHIP1.281.17
K/98.29.8
BB/92.92.4
HR/91.01.2
WAR45.036.1

2021 season

2021 pitching. The stronger figure in each row is highlighted — for ERA, FIP, WHIP and walks that is the lower one.
StatisticJon LesterAaron Nola
G2832
GS2832
IP141.1180.2
W79
SO91223
ERA4.714.63
FIP5.413.37
WHIP1.511.13
K/95.811.1
BB/93.51.9
FIP−12779
WAR-0.24.1

Postseason

Box-score figures only: October is kept out of the season constants, so there is no wOBA, FIP or dbWAR for it.

Every published postseason, pitching, summed with the rates recomputed from the counts.
StatisticJon LesterAaron Nola
G2612
GS2212
IP154.057.1
W95
SV00
SO13362
BB4013
ERA2.514.24
WHIP1.021.19
K/97.89.7
BB/92.32.0

More head to heads

The same seasons, measured against somebody else.

How these are computed

FIP uses the constant solved from this season’s own runs, and FIP− is park-adjusted against the same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page. To put these two beside a third, the comparison page takes up to four.