DCHP-2
backcatcher back-catcher, back catcher DCHP-2 (October 2016)
n. — Sports
the player who stands behind the batter in baseball.
Type: 5. Frequency — This term is used in Canada alternately with the term used predominantly in the US, catcher (see Image 2). It remains unclear why backcatcher is used in Canada while "catcher" is used in the US, although it is likely a preservation of older usage (see, e.g., the second 2011 quotation). Backcatcher is by far most frequent in Canada (see Charts 1 and 2).
See also COD-2, s.v. "backcatcher", which is marked "Cdn".References:
Images:
Image 1: A backcatcher (middle). Source: Wikimedia Commons. Photo: N. Pallas
Chart 1: Internet Domain Search, 10 Sep. 2013
Chart 2: Internet Domain Search, 10 Sep. 2013