11th Houston’s Mike Scott (18-10) beats Fernando Valenzuela (21-11) for the NL Cy Young Award, garnering 15 first-place votes to Valenzuela’s 9.
Forty-five-year-old player-manager Pete Rose is dropped from the Reds’ 40-man ML roster to make room for pitcher Pat Pacillo. Rose will continue to manage the club.
12th Roger Clemens wins the AL Cy Young Award unanimously, joining Denny McLain (1968) as the only pitchers to do so.
13th Dave Stewart, who went 9-5 for his hometown A’s after being released by the Phillies in May, signs a 2-year contract with Oakland.
14th The Doubleday Publishing Company agrees to sell the World Champion Mets to Nelson Doubleday and Fred Wilpon for $80.75 million. The company had purchased the Mets for a then-record $21.1 million in 1980.
18th Roger Clemens becomes the first starting pitcher to win the AL MVP Award since Vida Blue in 1971, receiving 19 of a possible 28 first-place votes to defeat runner-up Don Mattingly.
19th Phillies 3B Mike Schmidt wins the NL MVP Award, joining Stan Musial and Roy Campanella as the only 3-time winners. Schmidt led the NL with 37 HRs and 119 RBI.
24th Cardinals reliever Todd Worrell, who led the NL with 36 saves, is named NL Rookie of the Year. Worrell had helped St. Louis to the 1985 World Series as a late-season call-up but was still a rookie as defined by the BBWAA.
In yet another unwise trade of prospects for aging veterans, the Yankees deal pitchers Brian Fisher, Doug Drabek, and Logan Easley to the Pirates for pitchers Rick Rhoden, Cecilio Guante, and Pat Clements. Drabek will win the NL Cy Young Award for Pittsburgh in 1990.
The Twins announce that interim manager Tom Kelly will return on a permanent basis next season.
25th Jose Canseco wins the AL Rookie of the Year Award, becoming the first A’s player to do so since Harry Byrd in 1952.