| Friday, September 15th, 1978 | | LF Domingo Aguilar was injured while running the bases. The Diagnosis: sore knee. This is a day-to-day injury expected to last 1 day. |
| Wednesday, August 23rd, 1978 | | 2B Masaharu Koumura was injured in a collision at a base. The Diagnosis: shoulder soreness. He's expected to miss about 2 weeks. |
| Tuesday, August 22nd, 1978 | | CF José Saldaña was injured in a collision at a base. The Diagnosis: strained hamstring. He's expected to miss about 4 weeks. |
| Saturday, August 19th, 1978 | | LF Leonard O'Hoolighan was injured while running the bases. The Diagnosis: foot soreness. This is a day-to-day injury expected to last 4 days. |
| Monday, August 14th, 1978 | | RF Ricardo Rodríguez was injured on a defensive play. The Diagnosis: strained oblique. He's expected to miss about 3 weeks. |
| Sunday, August 13th, 1978 | | SS Gary Payne was injured while running the bases. The Diagnosis: mild abdominal strain. This is a day-to-day injury expected to last 4 days. |
| Thursday, July 27th, 1978 | | 1B Eduardo Jiménez was injured while running the bases. The Diagnosis: hamstring tightness. This is a day-to-day injury expected to last 6 days. |
| Sunday, July 23rd, 1978 | | MR Roberto Rosas was injured while pitching. The Diagnosis: rotator cuff inflammation. He's expected to miss about 3 months. |
| Friday, July 21st, 1978 | | RF Leonard O'Hoolighan was injured while running the bases. The Diagnosis: torn ankle ligaments. He's expected to miss about 4 weeks. |
| Thursday, July 20th, 1978 | | RF José Saldaña was injured on a defensive play. The Diagnosis: sprained knee. He's expected to miss about 4 weeks. |
| Saturday, July 8th, 1978 | | CF Ricardo Rodríguez is ill. The Diagnosis: flu-like symptoms. This is a day-to-day injury expected to last 3 days. |
| Sunday, June 4th, 1978 | | SP Pedro Hernández was injured while pitching. The Diagnosis: ulnar nerve irritation. He's expected to miss about 2-3 months. |
| Tuesday, May 9th, 1978 | | CF Domingo Aguilar was injured on a defensive play. The Diagnosis: mild shoulder strain. He's expected to miss about one week. |
| Wednesday, May 3rd, 1978 | | RF Leonard O'Hoolighan was injured on a defensive play. The Diagnosis: back tightness. This is a day-to-day injury expected to last 2 weeks. |
| Thursday, April 27th, 1978 | | 3B Héctor García was injured while running the bases. The Diagnosis: mild calf strain. This is a day-to-day injury expected to last 4 days. |
| Thursday, April 20th, 1978 | | MR Manuel Pérez was injured while pitching. The Diagnosis: heel soreness. This is a day-to-day injury expected to last 1 day. |
| Wednesday, April 19th, 1978 | | SP John Lancaster was injured while pitching. The Diagnosis: surgery to remove bone chips (elbow). He's expected to miss about 4 months. |
| Sunday, April 2nd, 1978 | | RF Nam-cheol Kim was injured on a defensive play. The Diagnosis: high ankle sprain. He's expected to miss about 4 weeks. |
| Saturday, April 1st, 1978 | | MR Sam Wolfe was injured while pitching. The Diagnosis: sprained elbow. He's expected to miss about 3-4 weeks. |
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