The 2005 Baltimore Orioles season involved the Orioles finishing fourth in the American League East with a record of 74 wins and 88 losses. The team started off hot, compiling a record of 42 wins and 30 losses while spending 62 days in first place in the AL East. After June 23, the team started slipping on the way to a losing record and manager Lee Mazzilli's dismissal in early August.

Offseason

Regular season

Season standings

Record vs. opponents

Season summary

The Baltimore Orioles were in contention up to the all-star break, in second place, posting a record of 47–40. The Orioles trailed the Red Sox by just 2 games. The Orioles, however, posted a 27–48 record after the all-star break, finishing 21 games behind the Boston Red Sox and the New York Yankees.

Transactions

Roster

Player stats

Batting

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''

Pitching

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: Frederick