The Baseball Mystery (Ted Wilford 11), by Norvin Pallas (epub/Kindle/pdf)

When The Town Crier, the semi-weekly newspaper for which Ted Wilford writes and Nelson Morgan takes pictures during their college vacations, decides to bring the statewide baseball tournament to Forestdale, Ted and Nelson need about ten hands and a forty-eight hour day to handle it all. Ted is in general charge of all the complicated scheduling and housing arrangements, while Nelson is an official scorer.

Suddenly, in spite of the apparently smooth progress of the tournament, they begin to suspect something is wrong somewhere, and know they had to do something about it...