Here's the top 50 as of April 20, 2006 Which also includes the Washington Senators from 1961 to 1971. TEXAS RANGERS CAREER WINS W 1 Charlie Hough 139 2 Kenny Rogers 133 3 Bobby Witt 104 4 Ferguson Jenkins 93 5 Kevin Brown 78 6 Rick Helling 68 7 Jose Guzman 66 8 Dick Bosman 59 9 Danny Darwin 55 10 Darren Oliver 54 11 Nolan Ryan 51 12 Doc Medich 50 13 Gaylord Perry 48 14 Roger Pavlik 47 T15 Jon Matlack 43 T15 Joe Coleman 43 17 Jeff Russell 42 T18 Steve Comer 39 T18 Phil Ortega 39 T18 Jim Hannan 39 T18 Casey Cox 39 T22 Bennie Daniels 37 T22 Aaron Sele 37 24 Claude Osteen 33 25 John Burkett 32 T26 Rick Honeycutt 31 T26 Pete Richert 31 T26 Frank Tanana 31 T26 Doyle Alexander 31 T30 Jim Bibby 30 T30 Steve Hargan 30 32 Jackie Brown 28 33 Camilo Pascual 27 T34 Steve Foucault 26 T34 Ron Kline 26 T36 Darold Knowles 25 T36 Mike Mason 25 38 Jim Umbarger 24 T39 Bert Blyleven 23 T39 Barry Moore 23 41 Chan Ho Park 22 T42 Doug Davis 21 T42 Bob Humphreys 21 T42 Ken Hill 21 T45 Ryan Drese 20 T45 Greg Harris 20 T45 John Wetteland 20 T45 Kevin Gross 20 T45 Dock Ellis 20 T45 Dave Schmidt 20