Overview

The improved NPB/KBO timeline moves from a generic, score-only event stream to a pitch-by-pitch, player-attributed feed with baseball-native terminology. The following documents 5 representative updates demonstrating the key structural changes.

Source game: Hanwha Eagles vs Samsung Lions — sr:sport_event:67203934 — KBO League 2026, 14 April 2026

https://api.sportradar.com/baseball/trial/v2/en/sport_events/sr:sport_event:67203934/timeline.json

Endpoints Affected

Update 1 — Inning Start

Old — period_start (generic, sport-agnostic language)

{
  "id": "2328046560",
  "type": "period_start",
  "time": "2026-04-14T10:01:52+00:00",
  "period_name": "1st_half"
}

New — inning_half_start (baseball-native)

{
  "id": 2328025702,
  "type": "inning_half_start",
  "time": "2026-04-14T09:31:01+00:00",
  "inning_half": "top"
}

📘
period_start + period_name: "1st_half" is replaced by inning_half_start + inning_half(top ,bottom) — terminology now maps directly to baseball convention.

Update 2 — Individual Pitch

Old — No equivalent

New — pitch-result

{
   "id":2328026198,
   "type":"pitch_result",
   "time":"2026-04-14T09:31:46+00:00",
   "players":[
      {
         "id":"sr:player:2777589",
         "name":"Dong-Ju, Moon",
         "type":"pitcher"
      }
   ],
   "inning_half":"top",
   "result":"ball",
   "count_balls":1,
   "count_strikes":0,
   "outs":1
}

📘
The old feed had no pitch-level data. The new feed emits every pitch with pitcher ID, result (ball, strike, foul), and running ball-strike count.

Update 3 — Out Recorded

Old — No equivalent

New — out_recorded

{
   "id":2328026064,
   "type":"out_recorded",
   "time":"2026-04-14T09:31:32+00:00",
   "players":[
      {
         "id":"sr:player:3167744",
         "name":"Seung-kyu, Park",
         "type":"batter"
      }
   ],
   "inning_half":"top",
   "out_type":"ground_out",
   "outs":1,
   "count_balls":0,
   "count_strikes":0,
   "home_score":0,
   "away_score":0
}

📘
The old feed had no out events. The new feed captures each out with batter identity, out type (ground_out, fly_out, strikeout, etc.) and a running out count.

Update 4 — Run Scored (replaces `score_change`)

Old — score_change (no player context)

{
  "id": "2328053324",
  "type": "score_change",
  "time": "2026-04-14T10:10:51+00:00",
  "competitor": "away",
  "home_score": 0,
  "away_score": 1
}

New — run_scored + inning_score_update

{
   "id":2328056170,
   "type":"run_scored",
   "time":"2026-04-14T10:14:35+00:00",
   "players":[
      {
         "id":"sr:player:3155642",
         "name":"Won-seok, Lee",
         "type":"runner"
      }
   ],
   "inning_half":"bottom",
   "scored_run_type":"earned_run",
   "starting_base":1,
   "count_balls":0,
   "count_strikes":0,
   "outs":2
}

📘
score_change is replaced by run_scored (identifies the scoring runner, earned/unearned, and the base they started from) paired with inning_score_update for the inning-level score ledger.

Update 5 — At-Bat Result

Old — No equivalent

New — at_bat_result

{
    "id": 2328194098,
    "type": "at_bat_result",
    "time": "2026-04-14T13:15:13+00:00",
    "players": [
        {
            "id": "sr:player:3166756",
            "name": "Sei-hyok, Park",
            "type": "batter"
        }
    ],
    "outcome": "single",
    "is_out": false,
    "outs_on_play": 0,
    "outs": 0,
    "inning_half": "top",
    "advancement_type": "single",
    "starting_base": 0,
    "ending_base": 1,
    "count_balls": 0,
    "count_strikes": 0,
    "pitch_count": 0,
    "errors": 0
},

📘
The old feed only tracked scoring plays. The new feed closes every at-bat with its final outcome (walk, single, double, etc.), whether it resulted in an out, and how the batter advanced.

Summary of Changes

Aspect	Old (Global)	New (Baseball-Specific)
Granularity	Score changes only	Every pitch
Terminology	Generic (`period_start`, `break_start`)	Baseball-native (`inning_half_start`, `out_recorded`)
Player Attribution	None	Pitcher, batter, runner on every event
Out Tracking	Not present	`out_recorded` with `out_type` + running count
Score events	Single `score_change`	`run_scored` (runner detail) + `inning_score_update`
At-bat outcomes	Not present	`at_bat_result` with outcome + advancement type
Count tracking	Not present	`count_balls` / `count_strikes` on every pitch/out

Timeline Data Points

Browse drop-downs below for definitions of all new Timeline data points. Or reference the updated Global Baseball OpenAPI spec.

Game Timeline

Attribute	Parent Element	Type	Description
`advancement_type`	`timeline` - `event`	String	Information on how a batter advanced on a play `unknown`, `catcher_interference`, `hit_by_pitch`, `on_error`, `single`, `double`, `triple`, `sacrifice_bunt`, `sacrifice_fly`, `walk`, `fielders_choice`, `other`
`ball_in_play_type`	`timeline` - `event`	String	Indicates, along with `type="ball_in_play`, that a batter struck a ball into play. The following event indicates the outcome of the ball in play.
`base`	`timeline` - `event`	Integer	Base associated with a `runner_check` event type
`count_balls`	`timeline` - `event`	Integer	Number of balls in an at bat, after an event
`count_strikes`	`timeline` - `event`	Integer	Number of strikes in an at bat, after an event
`ending_base`	`timeline` - `event`	Integer	Ending base number for a player after an event
`errors`	`timeline` - `event`	Integer	Number of errors in a play
`id`	`timeline` - `event`	String	Unique Id of a timeline event ex. `2182830584`
`inning`	`timeline` - `event`	Integer	Inning number associated with a timeline event. Typically populates at the end of a full innning along with a `inning_score_update`.
`inning_half`	`timeline` - `event`	String	Indicates the type of inning associated with a timeline event ex. `top`, `bottom`
`inning_away_score`	`timeline` - `event`	Integer	Number of runs scored for the away team in an inning. Typically populates at the end of a full innning along with a `inning_score_update`.
`inning_home_score`	`timeline` - `event`	Integer	Number of runs scored for the home team in an inning. Typically populates at the end of a full innning along with a `inning_score_update`.
`is_out`	`timeline` - `event`	Boolean	Signifies an out was recorded for an event when `true`
`on_base_type`	`timeline` - `event`	String	Method of reaching base for a player. Typically associated with a `player_on_base` event type. ex. `single`, `walk`, `hit_by_pitch` See enum_on_base_type in our Global Baseball spec for a complete list of types
`outcome`	`timeline` - `event`	String	Outcome of an at bat ex. `single`, `double`, `walk`
`out_base`	`timeline` - `event`	Integer	Base number where an out was recorded
`out_type`	`timeline` - `event`	String	Type of out recorded for an event. Typically associated with a `player_out` event type. ex. `strikeout`, `force_out`, `ground_out` See enum_out_type in our Global Baseball spec for a complete list of types
`outs`	`timeline` - `event`	Integer	Number of current outs in an inning
`outs_on_play`	`timeline` - `event`	Integer	Number of outs assocated with an event
`pitch_number`	`timeline` - `event`	Integer	Pitch number of an at bat
`qualifier`	`timeline` - `event`	String	Designation of a competitor for a timeline event. Typically used for a `substitution` event type. `home`, `away`
`result`	`timeline` - `event`	String	Result of a pitch ex. `ball`, `strike`, `foul`
`scored_run_type`	`timeline` - `event`	String	Type of out run for an event. Typically associated with a `run_scored` event type. ex. `strikeout`, `force_out`, `ground_out` See enum_scored_run_type in our Global Baseball spec for a complete list of types
`starting_base`	`timeline` - `event`	Integer	Starting base number for a player after an event
`time`	`timeline` - `event`	Date-time	Timestamp of a timeline event ex. `2024-04-16T20:49:49+00:00`
`type`	`timeline` - `event`	String	Type of timeline event ex. `match_started`, `run_scored`, `player_out`, `substitution`, `strike` See enum_event_type in our Global Baseball spec for a complete list of event types

Player (Timeline Event)

Attribute	Parent Element	Type	Description
`id`	`timeline` - `event` - `player`	String	Unique ID of a player associated with an event ex. `sr:player:1396097`
`name`	`timeline` - `event` - `player`	String	Name of a player associated with an event ex. `Varsho, Daulton`
`type`	`timeline` - `event` - `player`	String	Player type associated with an event ex. `batter`, `pitcher`, `runner`, `substituted_out`, `substituted_in`