The 1978 San Diego Padres season was the tenth in franchise history. They finished in fourth place in the National League West with a record of 84–78, eleven games behind the first-place Los Angeles Dodgers. This was the Padres' first-ever winning season.

Offseason

Regular season

In 1978, the Padres achieved their first winning season in team history, finishing .510, six games over .500. On June 9, the one-third point of the season, the team stood at .420. The last two-thirds of the season, they went .560, which included a ten-game winning streak from July 25 to August 4. The Padres were also extremely impressive at home that season, going .620. Notable contributing players: Gaylord Perry became the second Padre in three seasons to win the National League Cy Young Award, leading the league in wins (21) and winning percentage (.778). Rollie Fingers won the league's Rolaids Relief Award, leading the league in saves (37). As for position players, OF Dave Winfield lead the team with his best offensive season to date (.308, 24 HR, 97 RBI, 21 SB, 151 OPS+). SS Ozzie Smith finished 2nd in the National League Rookie of the Year voting (40 SB). Along with their notable contributions, all 4 players have been inducted into the Baseball Hall of Fame. Along with the 1979 season, this is the only time in franchise history that the Padres had 4 future Hall-of-Famers on their roster.

Opening Day lineup

Season standings

Record vs. opponents

Notable 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

Awards and honors

All-Stars

1978 Major League Baseball All-Star Game

Farm system