This post comes courtesy of @dkineejr, who asked this question on Twitter today:
Has there ever been a playoff team with only 1 player eligible for the batting title?
The answer is no, at least not in the expansion era (1961 to present). This is relevant because the Phillies almost surely will finish the season with only Jimmy Rollins eligible for the batting title. To qualify, a player must finish the season with at least 502 plate appearances. With 19 games remaining, Rollins has 624 plate appearances. Next closest to qualifying is John Mayberry Jr., who has 409 plate appearances (meaning he'd have to average more than five plate appearances per game the rest of the way to reach the threshold.
How weird of a season has it been for the Phillies? Hunter Pence and Shane Victorino are currently second and third on the team in plate appearances. Pence is 31 ahead of Mayberry. Victorino is 22 ahead. Of the players still on the roster, Ty Wigginton is fifth on the team.