Returns the line movement of one player prop: the opening line and every recorded change in line and price for a game, player and category. Defaults to Pinnacle; pass book to trace another sportsbook.

Returns the line movement of one player prop: the opening line and every recorded change in line and price for a game, player and category. Defaults to Pinnacle; pass book to trace another sportsbook.

Without hours the window starts at that book's opening line for the prop.

Pass the event's eventId field, the {sport}:{away}@{home}-{YYYYMMDD} form. The numeric id field beside it is the sportsbook's own and returns 400 here rather than an empty result. The date in eventId is the UTC start date, except for MLB games starting from 2026-10-11T10:00Z, which carry the US Eastern date; earlier MLB games keep the UTC date. Before that change, an MLB game starting at 8 PM ET or later and the next day's game between the same teams could share one eventId. NBA and NHL stay UTC-dated. NBA has about one pair of games a season sharing an eventId. NHL has about one pair a season of the same teams on one date, home and away swapped: two eventIds, but the /api/v1/history endpoints match both orderings, so each id returns both games' rows.