» Mike Moore, 9-15 last season for Seattle, signs as a free agent with the AL champion A's.
» P Rick Sutcliffe, who went 17-10 for the sub-.500 Dodgers, receives 20 of 24 votes to earn the NL Rookie of the Year honors.
» The Reds fire manager Sparky Anderson after 9 years, during which the club averaged 96 wins per season and won 5 divisional titles, 4 league pennants, and 2 World Championships.
The Orioles sign pitcher Steve Stone, a reentry free agent formerly with the White Sox.
» Oriole Al Bumbry beats out 5 other vote-getters to win AL Rookie of the Year honors. The OF played just 110 games, but tied for the league lead in triples (11) and batted .337.
» The Dodgers trade OF Frank Robinson, P Bill Singer, and 3 others to the Angels for P Andy Messersmith and 3B Ken McMullen.
» Los Angeles 2B Ted Sizemore becomes the 7th Dodger to win NL Rookie of the Year honors.
» The Twins send SS Zoilo Versalles and P Jim Grant to the Dodgers for C John Roseboro and pitchers Bob Miller and Ron Perranoski.
» The Pirates purchase P Juan Pizarro from the White Sox, completing a deal that sends P Wilbur Wood to Chicago.
» Haywood Sullivan (54-82) resigns as A's manager to become director of player personnel for the Red Sox. Al Dark replaces him.
» Philadelphia sends P John Buzhardt and IF Charlie Smith to the White Sox for 1B Roy Sievers.
The AL announces that its Opening Day game in 1959 will be the earliest date ever, April 9.
Warren Spahn of the Braves wins the Cy Young Award as ML Pitcher of the Year almost unanimously. His only competition for the title is the White Sox, Dick Donovan, who received one vote.
The Cubs trade P Hal Jeffcoat to the Redlegs for C Hobie Landrith.
IL President Frank Shaughnessy reveals plans to form 2 new major leagues by merging the top teams in the American Association and the top teams from the International League. He thinks that in 5 to 6 years, ML baseball will elevate these 2 leagues, along with the Pacific Coast League, which nearly has ML status now.
The Browns trade C Gus Niarhos to Boston for Les Moss and Tom Wright. The team also signs SS Marty Marion, who has just been released as the Cardinal manager.
Having ousted Branch Rickey, Walter O'Malley now fires Burt Shotton as manager. Oakland (PCL) manager Chuck Dressen is his replacement.
» Hal Newhouser is named MVP in the AL gathering 4 more votes than teammate Dizzy Trout. Newhouser's 29 wins contrasts with 9-9-8-8 win totals in previous years. His 2.22 ERA is bettered by Trout (2.12), who also has 27 wins.
» The White Sox 25-year-old pitching star Monty Stratton has his leg amputated following a hunting accident.
» The NL buys George Magerkurth from the PCL for $2,000. This is the highest price paid for a new ump.
» AL umpire Billy Evans becomes business manager of the Indians following the purchase of the club by a group headed by Alva Bradley.
The Pirates trade OF Kiki Cuyler to the Cubs for 2B Sparky Adams and OF Pete Scott.
The Yanks release P Bob Shawkey and P Dutch Ruether.
President Soden buys the Providence franchise and players for $6,000.