- This was the last of four seasons that Manny Trillo spent as the Chicago Cubs' starting second baseman. After the 1978 season Trillo was traded to the Philadelphia Phillies.
- In 1978 Trillo was right at league average in fielding percentage, but he would improve his defense and win three Gold Gloves in the next four seasons in Philadelphia.
- 1978 Stats: .261, 4 HR, 55 RBI in 152 games
- 1978 Highlights:
- April 9 - Had four hits in Chicago's 4-3 victory over the Pittsburgh Pirates
- May 2 - Went 2 for 4 and doubled in the winning run in the 10th inning as the Cubs beat the LA Dodgers 5-4.
- July 23 - Went 2 for 4 and scored two runs to help the Cubs beat the San Diego Padres 4-3.
