Five days from now teams will be able to expand their rosters and carry up to 40 active players. I can’t remember a team ever carrying the maximum 40 players, but they can do so if they choose. The Yankees are planning to be aggressive with their September call-ups and get them on the roster right away. No waiting around for the Triple-A postseason to end or anything like that.
In all likelihood, the Yankees will use one September call-up spot for a designated pinch-runner. Most teams do these days. Last year the pinch-runner was Antoan Richardson — Richardson is the answer to the “who scored the winning run on Derek Jeter‘s walk-off single in his final home game?