In a career its Steve Carlton with 90. For a season its Dave Stewart with 16 in 1988. Career: BALKS BK 1 Steve Carlton 90 2 Bob Welch 45 3 Bud Black 43 T4 Phil Niekro 42 T4 Charlie Hough 42 6 Rick Sutcliffe 38 T7 Kevin Gross 35 T7 Jim Deshaies 35 T9 Joaquin Andujar 33 T9 Nolan Ryan 33 T9 Dwight Gooden 33 T9 Bob Walk 33 13 David Cone 32 T14 Rick Rhoden 31 T14 Charlie Leibrandt 31 T16 Bob McClure 30 T16 Dennis Martinez 30 T18 Jerry Koosman 29 T18 Randy Johnson 29 T20 Jose Rijo 28 T20 Brian Anderson 28 T22 Pete Smith 27 T22 Jack Morris 27 T22 Mike Jackson 27 T22 Tom Candiotti 27 T22 Frank Tanana 27 T27 Atlee Hammaker 26 T27 Greg Maddux 26 T27 John Candelaria 26 T27 Larry Christenson 26 T27 Bobby Witt 26 32 Dave LaPoint 25 Season: BALKS YEAR BK 1 Dave Stewart 1988 16 2 John Dopson 1989 15 3 Bob Welch 1988 13 T4 Jose Guzman 1988 12 T4 John Candelaria 1988 12 T6 Mike Birkbeck 1988 11 T6 Rod Scurry 1988 11 T6 Steve Carlton 1979 11 T6 Jack Morris 1988 11 T10 Charlie Hough 1988 10 T10 David Cone 1988 10 T10 Dennis Martinez 1988 10 T10 Pascual Perez 1988 10 T14 Steve Carlton 1983 9 T14 Pedro Astacio 1993 9 T14 Gene Walter 1988 9 T14 Steve Carlton 1982 9 T14 Sid Fernandez 1988 9 T14 Bob Walk 1988 9 T14 Charlie Hough 1987 9 T21 Mike Jackson 1987 8 T21 Les Lancaster 1987 8 T21 Joe Magrane 1988 8 T21 Rick Mahler 1988 8 T21 Dennis Lamp 1988 8 T21 Frank Tanana 1978 8 T21 Mario Soto 1988 8 T21 Tom Candiotti 1989 8 T21 Bobby Witt 1988 8 T21 Rick Honeycutt 1988 8 T21 Bill Bonham 1974 8 T21 Chuck Finley 1988 8 T21 Bob Shaw 1963 8 T34 Roger Clemens 1988 7 T34 Dave LaPoint 1988 7 T34 Jeff Russell 1988 7 T34 Jerry Reed 1988 7 T34 Atlee Hammaker 1987 7 T34 Jerry Koosman 1975 7 T34 Randy Johnson 1989 7 T34 Larry Christenson 1978 7 T34 Kevin Gross 1987 7 T34 Nolan Ryan 1988 7 T34 Trevor Wilson 1992 7 T34 Bud Black 1982 7 T34 Pete Smith 1988 7 T34 Pete Smith 1989 7 T34 Bob Ojeda 1988 7 T34 Paul Moskau 1978 7 T34 Mike Dunne 1988 7 T34 Andy McGaffigan 1983 7 T34 Jeff Sellers 1988 7 T34 Dwight Gooden 1984 7 T34 Jim Deshaies 1986 7 T34 Bud Black 1992 7 T34 Eric Plunk 1988 7 T34 Joe Magrane 1987 7 T34 Greg Maddux 1987 7 T34 Steve Trout 1988 7 T34 Kevin Gross 1988 7 T34 Steve Carlton 1975 7 T34 Steve Carlton 1977 7 T34 Steve Carlton 1978 7 T34 Steve Carlton 1980 7 T34 Steve Carlton 1984 7 T34 Tom Candiotti 1988 7