Scrape Pitcher Performance Data Over a Custom Time Frame

This function allows you to scrape basic pitcher statistics over a custom time frame. Data is sourced from Baseball-Reference.com.

Usage

bref_daily_pitcher(t1, t2)

Arguments

t1

First date data should be scraped from. Should take the form "YEAR-MONTH-DAY"

t2

Last date data should be scraped from. Should take the form "YEAR-MONTH-DAY"

Value

Returns a tibble of pitcher performance over the requested date range, one row per player, with the following columns:

col_name	types	description
bbref_id	character	Baseball-Reference player id (slug).
season	integer	Season year.
Name	character	Player name.
Age	numeric	Player age during the season.
Level	character	League level (e.g. Maj-AL, Maj-NL).
Team	character	Team name.
G	numeric	Games pitched.
GS	numeric	Games started.
W	numeric	Wins.
L	numeric	Losses.
SV	numeric	Saves.
IP	numeric	Innings pitched.
H	numeric	Hits allowed.
R	numeric	Runs allowed.
ER	numeric	Earned runs allowed.
uBB	numeric	Unintentional walks allowed.
BB	numeric	Walks allowed.
SO	numeric	Strikeouts.
HR	numeric	Home runs allowed.
HBP	numeric	Batters hit by pitch.
ERA	numeric	Earned run average (per 9 innings).
AB	numeric	At-bats against.
X1B	numeric	Singles allowed.
X2B	numeric	Doubles allowed.
X3B	numeric	Triples allowed.
IBB	numeric	Intentional walks allowed.
GDP	numeric	Double plays induced.
SF	numeric	Sacrifice flies allowed.
SB	numeric	Stolen bases allowed.
CS	numeric	Runners caught stealing.
PO	numeric	Pickoffs.
BF	numeric	Batters faced.
Pit	numeric	Total pitches thrown.
Str	numeric	Strikes thrown (as a share of pitches).
StL	numeric	Looking (called) strikes share.
StS	numeric	Swinging strikes share.
GB.FB	numeric	Ground ball to fly ball share.
LD	numeric	Line drive share.
PU	numeric	Pop-up (infield fly) share.
WHIP	numeric	Walks plus hits per inning pitched.
BAbip	numeric	Batting average on balls in play allowed.
SO9	numeric	Strikeouts per 9 innings.
SO.W	numeric	Strikeout-to-walk ratio.
SO_perc	numeric	Strikeout rate (per batter faced).
uBB_perc	numeric	Unintentional walk rate (per batter faced).
SO_uBB	numeric	Strikeouts minus unintentional walks.

Examples

# \donttest{
  try(bref_daily_pitcher("2015-05-10", "2015-06-20"))
#> ── MLB Daily Pitcher data from baseball-reference.com ──────────────────
#> ℹ Data updated: 2026-06-12 14:06:41 UTC
#> # A tibble: 511 × 46
#>    bbref_id season Name    Age Level Team      G    GS     W     L    SV
#>    <chr>     <int> <chr> <dbl> <chr> <chr> <dbl> <dbl> <dbl> <dbl> <dbl>
#>  1 salech01   2015 Chri…    26 Maj-… Chic…     8     8     4     2    NA
#>  2 scherma…   2015 Max …    30 Maj-… Wash…     8     8     6     2    NA
#>  3 buehrma…   2015 Mark…    36 Maj-… Toro…     8     8     3     2    NA
#>  4 klubeco…   2015 Core…    29 Maj-… Clev…     8     8     3     4    NA
#>  5 keuchda…   2015 Dall…    27 Maj-… Hous…     8     8     4     3    NA
#>  6 degroja…   2015 Jaco…    27 Maj-… New …     8     8     4     2    NA
#>  7 samarje…   2015 Jeff…    30 Maj-… Chic…     8     8     2     2    NA
#>  8 colege01   2015 Gerr…    24 Maj-… Pitt…     8     8     7     1    NA
#>  9 buchhcl…   2015 Clay…    30 Maj-… Bost…     8     8     3     2    NA
#> 10 burnea.…   2015 A.J.…    38 Maj-… Pitt…     8     8     5     2    NA
#> # ℹ 501 more rows
#> # ℹ 35 more variables: IP <dbl>, H <dbl>, R <dbl>, ER <dbl>, uBB <dbl>,
#> #   BB <dbl>, SO <dbl>, HR <dbl>, HBP <dbl>, ERA <dbl>, AB <dbl>,
#> #   X1B <dbl>, X2B <dbl>, X3B <dbl>, IBB <dbl>, GDP <dbl>, SF <dbl>,
#> #   SB <dbl>, CS <dbl>, PO <dbl>, BF <dbl>, Pit <dbl>, Str <dbl>,
#> #   StL <dbl>, StS <dbl>, GB.FB <dbl>, LD <dbl>, PU <dbl>, WHIP <dbl>,
#> #   BAbip <dbl>, SO9 <dbl>, SO.W <dbl>, SO_perc <dbl>, …
# }