1978 Kansas City Royals season

The 1978 Kansas City Royals season was their tenth in Major League Baseball. The Royals won their third consecutive American League West title with a record of 92–70. For the third postseason in a row, Kansas City lost to the New York Yankees, falling 3-1 in the ALCS.

Notable transactions

 * April 4, 1978: John Mayberry was purchased from the Royals by the Toronto Blue Jays.
 * June 5, 1978: The Royals traded a player to be named later to the San Diego Padres for Steve Hamrick (minors). The Royals completed the deal by sending Gary Lance to the Padres on September 29.
 * August 3, 1978: Gerry Ako (minors) and cash were traded by the Royals to the Milwaukee Brewers for Jamie Quirk.

Draft picks

 * June 6, 1978: 1978 Major League Baseball draft
 * Jeff Cornell was drafted by the Royals in the 8th round.
 * Frank Viola was drafted by the Royals in the 16th round, but did not sign.

Regular season

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 * Legend:      = Win       = Loss       = Postponement Bold = Royals team member

Postseason Game log

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 * Legend:      = Win       = Loss     Bold = Royals team member

Starters by position
''Note: Pos = Position; G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Other batters
''Note: G = Games played; AB = At bats; H = Hits; Avg. = Batting average; HR = Home runs; RBI = Runs batted in''

Starting pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Other pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Relief pitchers
Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts

Game 1
October 3: Royals Stadium

Game 2
October 4: Royals Stadium

Game 3
October 6: Yankee Stadium

Game 4
October 7: Yankee Stadium

Farm system
LEAGUE CHAMPIONS: Omaha