OPS (On-Base Plus Slugging)

On-base percentage plus slugging percentage — a simple, powerful measure of a hitter's overall offensive production.

OPS combines two stats: on-base percentage (OBP), which measures how often a batter reaches base, and slugging percentage (SLG), which measures the average bases gained per at-bat. Adding them together gives a quick approximation of a batter's total offensive value.

OPS benchmarks by tier: - Below .700: below average - .700–.799: average - .800–.899: good (above-average starter) - .900–.999: great (All-Star caliber) - 1.000+: elite (MVP territory)

OPS+ adjusts OPS for ballpark and era, setting 100 as the league average. A career OPS+ above 140 is a strong HOF indicator for position players. OPS has limitations — it weights OBP and SLG equally, even though OBP is roughly 1.5x more valuable per run generated — but it remains one of the most cited stats in modern analysis.