In 2003, St. Louis Cardinal catcher Mike Matheny did something that no other catcher has ever done. He went through an entire season (minimum 125 games) with no errors.
Of the 16 top fielding seasons by catchers, 5 of them are by the Houston Astros’ defensive stalwart Brad Ausmus. No one else has even 2 seasons on this list.
A note: only one catcher has ever caught 160 games in a season. The Cubs’ Randy Hundley in 1968 caught exactly 160 games.