| Thursday, December 18th , 1958 | Released SS Ed Tennison. | Thursday, December 11th , 1958 | SS Bob Decker was added to the secondary (40-man) roster. | 2B Jack Betts was designated for assignment, placed on waivers and taken off the secondary (40-man) roster. | RP Carl Potter was designated for assignment, placed on waivers and taken off the secondary (40-man) roster. | Purchased the contract of RP Roy Ellis from Triple A Milwaukee. | Purchased the contract of CF Byron Burnett from Double A Little Rock. | Released RP Bill Shepherd. | Released RF Del Peters. | Friday, October 17th , 1958 | Signed Bench Coach Ben Watkins to a 2-year, $4,000 per year contract. | Monday, September 22nd , 1958 | Signed free agent RF Jim Warnock to a minor league contract. | Thursday, September 18th , 1958 | Released SP Jim Lewis. | Wednesday, August 27th , 1958 | Signed free agent RP Andy Clarke to a minor league contract. | Released RP Max Reed. | Friday, August 15th , 1958 | Signed free agent RP Bill Williams to a minor league contract. | Saturday, August 9th , 1958 | Signed free agent RF Jack Freeman to a minor league contract. | Saturday, August 2nd , 1958 | Signed free agent RF Lou Kinney to a minor league contract. | Signed free agent RP John Cole to a minor league contract. | Monday, July 14th , 1958 | Signed free agent SS Harvey Childs to a minor league contract. | Signed free agent RF Jack Van Slooten to a minor league contract. | Signed free agent SP Bob Miller to a minor league contract. | Signed free agent RP Steve Ward to a minor league contract. | Thursday, June 26th , 1958 | Signed free agent SS Tom Perry to a minor league contract. | Signed free agent RF Mike Gardner to a minor league contract. | Signed free agent SP Don Hunt to a minor league contract. | Released RP Marty Green. | Released RP John Brown. | Friday, June 20th , 1958 | Signed free agent SP Johnny Hoffman to a minor league contract. | Signed free agent RF Charlie Palmer to a minor league contract. | Signed free agent SP George Chambers to a minor league contract. | Thursday, June 19th , 1958 | Drafted SP Henry Henderson in the 1958 first-year player draft (Round 1, Pick 6, 6th overall pick). | Drafted 2B George Fox in the 1958 first-year player draft (Round 2, Pick 6, 22nd overall pick). | Drafted SS Alex Wilson in the 1958 first-year player draft (Round 3, Pick 6, 38th overall pick). | Drafted SP Carl Levy in the 1958 first-year player draft (Round 4, Pick 6, 54th overall pick). | Drafted 2B Bill Tannen in the 1958 first-year player draft (Round 5, Pick 6, 70th overall pick). | Drafted SP Larry Barker in the 1958 first-year player draft (Round 6, Pick 6, 86th overall pick). | Drafted RP Bill Scott in the 1958 first-year player draft (Round 7, Pick 6, 102nd overall pick). | Drafted SP John Welch in the 1958 first-year player draft (Round 8, Pick 6, 118th overall pick). | Drafted 2B Bob Jones in the 1958 first-year player draft (Round 9, Pick 6, 134th overall pick). | Drafted CF Bob Starr in the 1958 first-year player draft (Round 10, Pick 6, 150th overall pick). | Drafted SP Robert Lamb in the 1958 first-year player draft (Round 11, Pick 6, 166th overall pick). | Drafted SP Jim Johnson in the 1958 first-year player draft (Round 12, Pick 6, 182nd overall pick). | Drafted SP Bill Mulkey in the 1958 first-year player draft (Round 13, Pick 6, 198th overall pick). | Drafted C Hank Hill in the 1958 first-year player draft (Round 14, Pick 6, 214th overall pick). | Drafted RP John Blakely in the 1958 first-year player draft (Round 15, Pick 6, 230th overall pick). | Drafted SS Luke Larson in the 1958 first-year player draft (Round 16, Pick 6, 246th overall pick). | Drafted RP Max Reed in the 1958 first-year player draft (Round 17, Pick 6, 262nd overall pick). | Drafted RP Emil Cooper in the 1958 first-year player draft (Round 18, Pick 6, 278th overall pick). | Drafted LF Eddie Miller in the 1958 first-year player draft (Round 19, Pick 6, 294th overall pick). | Drafted C Fred Davis in the 1958 first-year player draft (Round 20, Pick 6, 310th overall pick). | Promoted 3B Chief Brady from Class A Rockford to Double A Little Rock. | Demoted 3B Al Hall from Double A Little Rock to Class A Rockford. | Assigned RP Joe Lee to Class B San Jose. | Released SP Robert Lamb. | Released SP Bill Mulkey. | Released C Hank Hill. | Released SS Luke Larson. | Released LF Eddie Miller. | Released RP John Blakely. | Released RP Max Reed. | Released SP John Welch. | Released RP Pete Arnold. | Released RP Bill Cole. | Released C Roland Wilhelm. | Released 2B Vern Roberts. | Released SS Elmer DeCoux. | Released C Fred Davis. | Released RP Emil Cooper. | Released RP Bill Scott. | Released SP Jim Johnson. | Released RP Jud Hess. | Released RP Bobby Austin. | Released 2B Bob Jones. | Wednesday, May 14th , 1958 | SP Carl Potter did not elect for free agency and will remain in the Chicago organization. | Tuesday, April 15th , 1958 | Signed free agent RF Jack Freeman to a minor league contract. | Signed free agent RP Bill Hill to a minor league contract. | Saturday, April 12th , 1958 | Signed free agent RP Bill Boone to a minor league contract. | Thursday, April 10th , 1958 | Signed free agent RF Bill Gill to a minor league contract. | Sunday, April 6th , 1958 | Signed free agent RF Hop Granville to a minor league contract. | Sunday, February 2nd , 1958 | Signed free agent SP Earl Sullivan to a minor league contract. | Tuesday, January 28th , 1958 | Signed free agent RF Jim Arnold to a minor league contract. | Wednesday, January 22nd , 1958 | Signed free agent RF Joel Moore to a minor league contract. | Thursday, January 16th , 1958 | Signed free agent RP Ralph Millsap to a minor league contract. | Wednesday, January 15th , 1958 | Signed free agent RP Tom Weaver to a minor league contract. | Sunday, January 12th , 1958 | Signed free agent RF Del Peters to a minor league contract. | Saturday, January 4th , 1958 | Signed free agent LF Charlie Enslow to a minor league contract with a major league option. | Thursday, January 2nd , 1958 | Signed free agent SP Joe Sigler to a minor league contract. | Signed free agent RP Johnny Gerstel to a minor league contract. | | |