Spring training statistics for emerging players like Halvorsen are typically compiled by Major League Baseball’s official statistics engine and by independent sites such as Baseball‑Reference. For many prospects, especially those who have not yet appeared in a regular‑season game, the data may consist of a handful of at‑bats, pitch‑type frequencies, and fielding chances, all logged in a limited time window. Understanding the provenance of each figure—whether it originates from a team‑issued box score or a third‑party aggregator—helps gauge reliability and highlights possible gaps.
Because spring training serves as a preparation phase rather than a competitive benchmark, teams often release only summary metrics. Detailed splits (e.g., against left‑handed pitching) are rarely published, and defensive metrics may be omitted entirely. Consequently, any statistical narrative must be built on a foundation of incomplete information, with the acknowledgment that the observed numbers represent a snapshot, not a full season profile.