Tracking Technology & The Modern MLB Era

Since the rollout of radar and camera tracking systems like Statcast, Major League Baseball has undergone a dramatic transformation. Explore how pitching strikeout rates and hitter hard-hit contact have evolved in tandem across every team from 2005 through 2025.

+31.5%

Strikeout Rate

6.55 → 8.61 K/9 league average

+39.4%

Hard-Hit Rate

30.2% → 42.1% contact ≥ 95 mph

20 Seasons

Era Comparison

Pre-Statcast vs. Statcast eras

⚡ Pitching: Strikeout Rates (K/9)

Each point represents an individual pitcher-season (minimum 30 IP), displaying real pitcher-level variation across thousands of observations. The dashed line traces the annual league average K/9 across the pre-Statcast and post-Statcast eras. Use the dropdown menu to choose individual teams and see their specific pitchers and franchise average.

Between the pre-Statcast era (2005–2014) and the post-Statcast era (2015–2025), average pitcher strikeout rates increased from 7.21 to 8.63 K/9, representing a 19.7% increase across eras (and a 31.5% increase from 6.55 in 2005 to 8.61 in 2025).

💥 Hitting: Hard-Hit Rates (%)

Each point represents a qualifying hitter’s individual hard-hit rate for that season, showing real individual-level variation across 4,251 player-seasons. The dashed line traces the annual league average across the pre-Statcast era (BIS video-scouted Hard%) and the Statcast era (radar-measured exit velocity ≥ 95 mph). Use the dropdown menu to choose individual teams and see their specific hitters and franchise average.

Average hard-hit rates rose from 30.5% in the pre-Statcast era to 38.5% in the Statcast era—a 26.2% relative increase (an 8.0 percentage-point gain, climbing to 42.1% by 2025). Note that part of this shift coincides with the change in data measurement (scout observation vs. automated radar tracking).

The Statcast Era

The introduction of Major League Baseball’s Statcast system in 2015 revolutionized how the sport is measured and played. By deploying high-resolution cameras and radar across every ballpark, Statcast enabled the tracking of granular metrics like exit velocity, launch angle, and pitch spin rates on every play.

This project examines how key baseball statistics evolved alongside this technological shift. By comparing trends across the pre-Statcast era (2005–2014) and post-Statcast era (2015–2025), we analyze whether the availability of tracking data coincided with noticeable changes in pitching strikeout rates (K/9) and hitter hard-hit percentages.

⚡ Pitching Evolution

+19.7% K/9 Increase

League average K/9 jumped from 7.21 to 8.63 as spin and movement tracking proliferated.

💥 Hitting Evolution

+26.2% Hard-Hit Surge

Hard-hit rate rose from 30.5% to 38.5% as launch angle and exit velocity became focal points.