No. 1 / On-Base Percentage / 2021
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Season leader
Player stats
On-Base Percentage 2021
How often a batter reaches base by a hit, walk or hit-by-pitch, using the standard on-base denominator.
Minimum workload: 3.1 plate appearances per game, rounded to the nearest whole appearance. Completed seasons use the league's scheduled regular-season game count; seasons in progress use team games played. Batting-title exceptions are not applied. Data through December 31, 2021. Data refreshed Mar 13, 2026, 3:23 AM UTC.
- OBP
- How often a batter reaches base by a hit, walk or hit-by-pitch, using the standard on-base denominator.
Understanding On-Base Percentage
How often a batter reaches base by a hit, walk or hit-by-pitch, using the standard on-base denominator.
Formula: (H + BB + HBP) ÷ (AB + BB + HBP + SF)
Read rates alongside playing time. A small sample can produce an extreme result, and a missing value is different from zero.
Season rankings use regular-season records. A player has one combined row across teams; the team label identifies the associated team, not a separate team stint.
Source: MLB statistics and MLBDB derived measures. Formulas describe the measure above. Data refreshed Mar 13, 2026, 3:23 AM UTC.