Wooden baseball-bat sounds: "Hitting baseball w. wooden bat.wav" by CGEffex (https://freesound.org/people/CGEffex/sounds/93136/), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: selected excerpts, mono conversion, filtering, normalization and fades.

Other recorded sound credits (CC0 1.0, https://creativecommons.org/publicdomain/zero/1.0/):
Baseball Into Glove.aif — keus92 — https://freesound.org/people/keus92/sounds/432502/
Muscle_Idle.ogg, Revving.ogg and Revving_2.ogg — FreeCarSoundsGaming — https://freesound.org/people/FreeCarSoundsGaming/
Acceleration Car — Fabrizio84 — https://freesound.org/people/Fabrizio84/sounds/457958/
Screeching Tires #4 — Dorian CLAIR / BigSoundBank — https://bigsoundbank.com/screeching-tires-4-s2371.html
Car Crash (recorded metal/glass foley) — squareal — https://freesound.org/people/squareal/sounds/237375/
Small Crowd Applause 1 — snakebarney — https://freesound.org/people/snakebarney/sounds/138113/
Crowd Talking Quietly Stadium.mp3 (recorded in a concert hall) — FunWithSound — https://freesound.org/people/FunWithSound/sounds/381373/

Environment: Industrial Sunset Pure Sky, Poly Haven / CC0. https://polyhaven.com/a/industrial_sunset_puresky
Athlete and spectator: Microsoft Rocketbox, MIT. https://github.com/microsoft/Microsoft-Rocketbox
MIT License

Copyright (c) 2020 Microsoft

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.