Harry David Brecheen (/brəˈkiːn/, brə-KEEN, October 14, 1914 – January 17, 2004), nicknamed "the Cat", was an American left-handed pitcher in Major League Baseball who played most of his career for the St. Louis Cardinals.

[1] A two-time All-Star, Brecheen's overall career record was 133 wins and 92 losses, with a 2.92 earned run average over 12 seasons.

[1] After breaking Bill Sherdel's club record for career strikeouts by a left-hander in 1951, he held the mark until Steve Carlton surpassed it in 1971.

His career World Series ERA of 0.83 stood as the record (with at least 25 innings) until Jack Billingham broke it in 1976 with a mark of 0.36.

His playing career ended in 1954 when he hurt his arm trying to pick up a suitcase, but he remained with the organization as their pitching coach from 1954 to 1967.

He trained many young pitchers including Billy O'Dell, Jack Fisher, Jim Palmer, Dave McNally, Steve Barber, Chuck Estrada, Jerry Walker and Milt Pappas.

With Brecheen's help, seemingly washed up Phillies legend Robin Roberts made a successful comeback with the Orioles after going 1-10 with a 5.85 ERA in 1961.