Baseball has gone through changes over the last generation. The increase in data availability gives us insight on some of these changes. Below is a multitude of charts attempting to illustrate these changes. All data from Baseball-reference and Fangraphs. All data represents MLB league wide. Part I features general offense and overall pitching.
Three outcome (walk, strikeout, homerun) changes since 1995 per plate appearance
Batting average on balls in play
Percent of plate appearances resulting in balls in play
Walks per plate appearance
Strikeouts per plate appearance
Strikeouts per plate appearance during two-strike counts
Runs per game
Percent of runs via homerun
Homeruns per plate appearance
Number of bunts
Number of 100+ mph pitches
Number of 95+ mph pitches
Average pitch velocity - Six different pitches
Number of 95+ mph pitches per game
Number of pitches in between each 95+mph pitch
Pitch type frequency
Pitch type frequency - Change up/breaking ball/cutter) pitches ONLY
First pitch percentage
Number of pitches per game - Starting Pitchers
Relief pitching - Total plate appearances
Starting pitching - plate appearance 3rd and 4th time through order
Offensive output (wOBA) against starting pitching - 1st through 4th time through order AND offensive output for overall relief pitching
Defensive Shifts - Batting average with balls in play
Defensive Shifts - Overall offense (wOBA)
Flyball, ground ball, line drive percentages
Part II will feature specific game situation summaries
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