1978 Baltimore Orioles season

The 1978 Baltimore Orioles season was a season in American baseball. It involved the Orioles finishing fourth in the American League East with a record of 90 wins and 71 losses.

Offseason

 * November 23, 1977: Elrod Hendricks was signed as a free agent by the Orioles.
 * December 7, 1977: Bryn Smith, Rudy May, and Randy Miller were traded by the Orioles to the Montreal Expos for Don Stanhouse, Joe Kerrigan, and Gary Roenicke.
 * January 6, 1978: Ken Rudolph was released by the Orioles.
 * February 21, 1978: Tony Muser was released by the Orioles.

Opening Day starters

 * Mark Belanger
 * Al Bumbry
 * Doug DeCinces
 * Rick Dempsey
 * Larry Harlow
 * Dennis Martínez
 * Lee May
 * Eddie Murray
 * Ken Singleton
 * Billy Smith

Notable transactions

 * June 6, 1978: 1978 Major League Baseball Draft
 * Cal Ripken Jr. was drafted by the Orioles in the 2nd round, (46th overall). Player signed June 13, 1978.
 * Bobby Bonner was drafted by the Orioles in the 3rd round.
 * Mike Boddicker was drafted by the Orioles in the 6th round.

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

Farm system
LEAGUE CHAMPIONS: Miami