2018 MLB pitcher data — pbp2018 • qacr

Pitch by pitch data for select pitchers in the 2018 MLB season.

pbp2018

Format

A data frame with 84007 rows and 33 variables.

The variables are as follows:

player_name: pitcher name
game_date: game date
pitch_type: type of pitch (abbreviation)
pitch_name: type of pitch (full)
release_speed: pitch velocity at release point
events: result of play
description: result of pitch
stand: batter handedness
p_throws: pitcher handedness
bb_type: batted ball type
balls: number of balls
strikes: number of strikes
plate_x: horizontal location of pitch in strike zone from the umpire's perspective (zero is the middle of the strike zone)
plate_z: vertical location of pitch in strike zone from the umpire's perspective (zero is ground level at the point the pitch crosses the plate)
on_3b: TRUE if a runner is on third base
on_2b: TRUE if a runner is on second base
on_1b: TRUE if a runner is on first base
outs: number of outs
inning: inning number
inning_topbot: top or bottom of the inning
launch_speed: exit velocity off the bat
launch_angle: launch angle off the bat
effective_speed: "perceived velocity": pitch velocity adjusted for extension of the pitcher at the release point
release_spin_rate: spin rate (in revolutions per minute) of the pitch
release_extension: horizontal distance from pitcher's mound to release point of the pitch
estimated_ba_using_speedangle: expected batting average based on exit velocity and launch angle
estimated_woba_using_speedangle: expected weighted on-base average based on exit velocity and launch angle
at_bat_number: nth batter of the game to face the current pitcher
pitch_number: nth pitch in the current at bat
bat_score: current score for offensive team
fld_score: current score for defensive team
if_fielding_alignment: type of infield shift
of_fielding_alignment: type of outfield shift

Source

The data was obtained from Baseball Savant via a search, and subsequently subsetted.

Examples

summary(pbp2018$release_speed[pbp2018$player_name=="Jacob deGrom" & pbp2018$pitch_type=="FF"])
#>    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
#>   91.50   95.20   96.20   96.04   97.00   99.70 

table(pbp2018$player_name, pbp2018$pitch_type)
#>                    
#>                       CH   CU   EP   FC   FF   FS   FT   KC null   PO   SI   SL
#>   Aaron Nola         633  992    0    0 1165    0  422    0    0    0    0    0
#>   Blake Snell        559  588    0    0 1500    0    0    0    5    0    0  266
#>   Carlos Carrasco    485  236    0    0  922    0  390    0   99    1    0  914
#>   Chris Sale         480    0    0    0 1096    0  271    0    1    0    0  975
#>   Clayton Kershaw     11  466    0    0 1169    0    0    0    4    0    0 1157
#>   Cole Hamels        580  402    0  563  934    0  455    0    5    0    0  150
#>   Corey Kluber       205  708    0  932  280    0    0    0  104    1 1038    0
#>   Dallas Keuchel     438    0    0  525  413    0 1453    0    1    0    0  642
#>   David Price        712    0    0  817  502    0 1011   79    0    0    0    0
#>   German Marquez     201  739    0    0 1466    0  288    0    4    0    0  494
#>   Gerrit Cole        159    0    0    2 1737    0  201  664    0    0    0  682
#>   J.A. Happ          379   51    0    0 1839    0  433    0    2    0    0  391
#>   Jacob deGrom       516  255    0    0 1374    0  295    0    2    0    0  770
#>   Jake Arrieta       295  284    0    0   53    0    0    0    1    0 1475  652
#>   James Paxton        11    0    0  375 1653    0    0  560    4    0    0    0
#>   Jon Lester         290  501    0  796 1449    0    0    0   12    0  159    0
#>   Jose Berrios       271  908    0    0 1026    0  777    0   85    1    0    0
#>   Justin Verlander    53  545    0   20 2277    0    0    0    4    0    0  817
#>   Luis Severino      459    0    0    0 1663    0    0    0    2    0    0 1185
#>   Madison Bumgarner  157  466    0  720    0    0  703    0    7    0    0    0
#>   Masahiro Tanaka      0   98    0  100  553  771    0    0    2    0  132  820
#>   Max Scherzer       547  277    0  342 1746    0    0    0   13    0    0  568
#>   Nathan Eovaldi       0  110    0  677  845  257    0    0    8    0    0  232
#>   Noah Syndergaard   381  236    0    0  499    0    0    0    0    1  792  503
#>   Rick Porcello      377  470    0    0  718    0  954    0    0    0    0  804
#>   Shohei Ohtani        0   56    0    0  396  191    0    0    0    0    0  210
#>   Stephen Strasburg  428  421    0    0  980    0  141    0    3    0    0  188
#>   Walker Buehler      91    0    0  231  998    0  429  344   93    0    0  345
#>   Zack Greinke       661  350   79    0 1388    0  175    0    4    0    0  555