This is what I did (on PC)
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Step 1- download compressed file from link
https://imgur.com/d3jx0sf
Step 2- extract compressed file, gives me the following folder with two sub-folders
https://imgur.com/ixTRA63
Step 3- cut/copy the "2023 MLB CBL v5 FINAL.lg" subfolder from the extracted folder, and paste it in my "saved_games" OOTP folder
https://imgur.com/HBpucKe
Step 4- open OOTP, click Load Game, select "2023 MLB CBL v5 FINAL"
https://imgur.com/fIgLXE9
Step 5- bingo!
https://imgur.com/lhp0R0v