savant-extras 0.3.3

Baseball Savant leaderboard data — complements pybaseball with 16+ leaderboards

savant-extras

Baseball Savant leaderboard data — complements pybaseball.

pybaseball is great but many Baseball Savant leaderboards are missing or limited. savant-extras fills that gap with 16+ leaderboards covering batting, pitching, catching, baserunning, and fielding — all as simple one-line function calls returning DataFrames.

Installation

pip install savant-extras

Quick Start

from savant_extras import (
    bat_tracking, pitch_tempo, arm_strength,
    pitch_movement, swing_take, catcher_throwing,
)

# Bat tracking with custom date range (2024+)
df = bat_tracking("2024-04-01", "2024-04-30")

# Pitcher pitch tempo
df = pitch_tempo(2024)

# Outfielder arm strength
df = arm_strength(2024, position="Outfielder")

# Slider movement
df = pitch_movement(2024, pitch_type="SL")

# Batter plate discipline
df = swing_take(2024)

# Catcher pop time & CS rate
df = catcher_throwing(2024)

All Functions

Every leaderboard function returns a pd.DataFrame. Most have a _range() variant for multi-season queries (adds a year column).

Batting

Function	Data from	Description
bat_tracking(start_date, end_date)	2024+	Bat speed, attack angle, swing tilt (custom date range)
bat_tracking_monthly(year)	2024+	Monthly bat tracking (Apr–Oct)
bat_tracking_splits(year)	2024+	First-half / second-half splits
batted_ball(year)	—	GB/FB/LD rates, pull/oppo splits
home_runs(year)	—	HR distance, exit velocity, xHR, no-doubters
swing_take(year)	—	Run values by zone (heart/shadow/chase/waste)
year_to_year(year)	—	xwOBA changes across seasons

Pitching

Function	Data from	Description
pitch_tempo(year)	2010+	Pace metrics (median seconds, hot/warm/cold)
pitch_movement(year)	—	Horizontal/vertical break by pitch type
pitcher_arm_angle(year)	—	Release point angles and positions
running_game(year)	—	Pitcher running game (pickoffs, CS above avg)
timer_infractions(year)	2023+	Pitch clock violations

Catching

Function	Data from	Description
catcher_blocking(year)	—	Blocks above average, PB/WP prevention
catcher_throwing(year)	—	Pop time, exchange time, CS rate, arm strength
catcher_stance(year)	—	One-knee vs traditional: framing, blocking, throwing

Baserunning & Fielding

Function	Data from	Description
arm_strength(year)	2020+	Fielder throw speed by position
baserunning(year)	—	Total baserunning run value (XB + SB)
basestealing(year)	—	Stolen base run value, lead distances

Park Factors

Function	Data from	Description
park_factors(season)	2015+	Per-season ballpark run factors for all 30 MLB teams (FanGraphs)
park_factors_range(start, end)	2015+	Multi-season park factors concatenated

Columns returned: season, team, pf_5yr, pf_3yr, pf_1yr, pf_hr, pf_1b, pf_2b, pf_3b, pf_so, pf_bb, pf_fip. All factors: 100 = neutral, >100 = hitter-friendly, <100 = pitcher-friendly.

from savant_extras import park_factors, park_factors_range

# Single season
df = park_factors(2024)
print(df[df["team"] == "COL"][["team", "pf_5yr", "pf_hr"]])
#    team  pf_5yr  pf_hr
# 5   COL     116    131

# Multi-season (e.g. for model training)
df = park_factors_range(2020, 2025)
print(df.shape)  # 6 seasons × 30 teams = 180

Common Parameters

Parameter	Type	Description
player_type	str	"batter" or "pitcher" (where applicable)
min_*	int or str	最低出場基準。数値指定（例: min_pa=100）または "q"（MLB規定打席/投球回数を自動適用）
position	str	Position filter (arm_strength): "", "RF", "SS", etc.
pitch_type	str	Pitch type filter (pitch_movement): "FF", "SL", etc.

Multi-Season Queries

Most functions have a _range(start_year, end_year) variant:

from savant_extras import pitch_tempo_range, arm_strength_range

# Compare pitch tempo pre/post pitch clock
df = pitch_tempo_range(2022, 2024)

# 5 years of arm strength
df = arm_strength_range(2020, 2024)

Demo App

MLB Bat Tracking Dashboard — built with savant-extras (source)

Why savant-extras?

Leaderboard	pybaseball	savant-extras
Bat tracking (date range)	Full season only	Custom date ranges
Pitch tempo	Not supported	✅
Arm strength	Not supported	✅
Batted ball profile	Not supported	✅
Home runs	Not supported	✅
Pitch movement	Not supported	✅
Swing & take	Not supported	✅
Year-to-year changes	Not supported	✅
Pitcher arm angle	Not supported	✅
Running game (pitcher)	Not supported	✅
Catcher blocking	Not supported	✅
Catcher throwing	Not supported	✅
Catcher stance	Not supported	✅
Baserunning run value	Not supported	✅
Basestealing run value	Not supported	✅
Timer infractions	Not supported	✅
Park factors (FanGraphs)	Not supported	✅

Known Issues

• swing_take(): Baseball Savant の Swing & Take リーダーボードの CSV エンドポイントに障害中（ヘッダーのみ、データ行なし）。現在は空の DataFrame が返ります。上流 API が復旧次第、コード変更なしで動作します。代替として batted_ball() や year_to_year() を使用してください。

License

MIT