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What does CI stand for?

CI stands for Catcher's Interference (baseball)

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Slang/chat, popular culture

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Other Resources:
We have 83 other meanings of CI in our Acronym Attic

Samples in periodicals archive:

Danny Pulfer led off with a walk and got to second when UO catcher Eddie Rodriguez reached on catcher's interference, nullifying a grounder that WSU was turning into a double play until the ruling that his bat had hit the glove of WSU reserve catcher Paul Clingan.
A catcher's interference call on Brandon O'Conner allowed Leominster's Nick Cordio to reach base, starting the hosts' third-inning, small-ball rally.
Colt Morton, the starter at catcher, was the only Eugene batter to reach base, on a catcher's interference.
Flynn allowed an unearned run in the fourth, with Steve Roche scoring on a groundout by Mark Brousseau - Roche reached on catcher's interference, advanced to second on a wild pitch and took third on a single by John Jakaitis.