1984 December

5th  The A’s send base-stealing OF Rickey Henderson and P Bert Bradley to the Yankees in exchange for pitchers Jay Howell and Jose Rijo, OF Stan Javier, and minor leaguers Tim Birtsas and Eric Plunk. On the same day, the Yankees trade C Rick Cerone to the Braves for P Brian Fisher.

6th  The White Sox trade 1983 AL Cy Young Award winner LaMarr Hoyt and 2 minor leaguers to the Padres for P Tim Lollar, IF-OF Luis Salazar, and minor leaguers Ozzie Guillen and Bill Long. SS Guillen will win the AL Rookie of the Year Award next season and hold down the Sox shortstop spot till the end of the 1990s.  Workhorse Hoyt will be out of baseball in two years, amidst rumors of drug use.

7th  In a straight trade, the Mets send P Walt Terrell to the Detroit Tigers for 3B Howard Johnson. Hojo will start for 8 years in New York.  Terrell will have 6 seasons in Detroit, interrupted by stays with 4 other teams.

10th  Expos catcher Gary Carter becomes the 3rd All-Star caliber player in 5 days to be traded, going to the Mets in exchange for IF-OF Hubie Brooks, C Mike Fitzgerald, OF Herm Winningham, and minor league P Floyd Youmans.

11th  OF Fred Lynn, a free agent, signs a 4-year contract with the Orioles.

12thSt. Louis sends slugger George Hendrick and a minor leaguer to the Pirates for P John Tudor and Brian Harper. Tudor, at 12–11, was the ace of the Bucs’ staff, which set a record by having the NL’s best ERA, though the team finished last.  The 35-year-old Hendrick will play just a half season in the Iron City before going to California.

27th  Free-agent pitcher Ed Whitson, 14–8 for the Padres, begins a nightmarish association with the Yankees by signing a 5-year, $4.4 million contract.

31st  Despite 6 weeks of negotiations, the Basic Agreement between the players and owners that was reached after the 1981 strike expires. The players are now seeking increased contributions to their pension plan from the clubs’ additional television revenues, while the owners are hoping to slow the rapid growth of player salaries.