| Saturday, October 4th, 1980 | | SP Víctor López was injured while falling out of bed after having a nightmare. The Diagnosis: torn thumb ligament. He's expected to miss about 2 weeks. |
| Thursday, September 11th, 1980 | | MR Manuel Patriarco was injured while pitching. The Diagnosis: strained back. This is a day-to-day injury expected to last 2 weeks. |
| Saturday, September 6th, 1980 | | Justin Kass has suffered a setback in his recovery. He is not expected to recover for another 3 weeks. |
| Tuesday, August 26th, 1980 | | SP Wen Ying was injured while pitching. The Diagnosis: strained hamstring. He's expected to miss about 8-9 weeks. |
| Saturday, August 23rd, 1980 | | SP John Beatty was injured while pitching. The Diagnosis: herniated disc (neck). He's expected to miss about 3 weeks. |
| Thursday, August 21st, 1980 | | SP Wen Ying was injured while pitching. The Diagnosis: mild calf strain. This is a day-to-day injury expected to last 2 days. |
| Wednesday, August 20th, 1980 | | 2B Tom Allen was injured while running the bases. The Diagnosis: strained back. This is a day-to-day injury expected to last 5 days. |
| Tuesday, August 19th, 1980 | | 3B Guillermo Ayala is ill. The Diagnosis: stomach virus. He's expected to miss about 6 days. |
| Monday, August 11th, 1980 | | 1B Zane Thompson was injured in a collision at a base. The Diagnosis: bruised finger. This is a day-to-day injury expected to last 1 day. |
| Saturday, August 2nd, 1980 | | SS António Peña was injured in a collision at a base. The Diagnosis: sprained knee. He's expected to miss about 3-4 weeks. |
| Saturday, July 26th, 1980 | | SP Tracy Lee was injured while pitching. The Diagnosis: ruptured tendon (finger). He's expected to miss about 3-4 months. |
| Sunday, July 13th, 1980 | | SP Yukinaga Ohayashi was injured while pitching. The Diagnosis: torn UCL (Tommy John surgery). He's expected to miss about 14 months. |
| Monday, July 7th, 1980 | | MR Manuel Patriarco was injured while pitching. The Diagnosis: shoulder subluxation. He's expected to miss about one week. |
| Sunday, July 6th, 1980 | | RF Al Phillips is ill. The Diagnosis: sinus infection. He's expected to miss about 2 days. |
| Tuesday, June 24th, 1980 | | MR Christian Calvert was injured while pitching. The Diagnosis: mild oblique strain. This is a day-to-day injury expected to last 2 days. |
| Sunday, June 22nd, 1980 | | SP Yukinaga Ohayashi was injured while pitching. The Diagnosis: finger blister. This is a day-to-day injury expected to last 5 days. |
| Monday, June 16th, 1980 | | RF Juan Rico was injured in a collision at a base. The Diagnosis: oblique strain. He's expected to miss about 4 weeks. |
| Tuesday, June 10th, 1980 | | 2B Tom Allen was injured while running the bases. The Diagnosis: sore groin. This is a day-to-day injury expected to last 3 days. |
| Sunday, May 18th, 1980 | | SP John Beatty was injured while pitching. The Diagnosis: partially torn labrum. He's expected to miss about 3 months. |
| Sunday, April 20th, 1980 | | MR Mike Piper was injured while pitching. The Diagnosis: rotator cuff inflammation. He's expected to miss about 3 months. |
| Tuesday, April 15th, 1980 | | 2B Tom Allen was injured while running the bases. The Diagnosis: back soreness. He's expected to miss about 6 days. |
| Friday, April 4th, 1980 | | SS António Peña was injured while stealing a base. The Diagnosis: mild hamstring strain. This is a day-to-day injury expected to last 2 days. |
| Friday, March 28th, 1980 | | CF Juan Garza was injured on a defensive play. The Diagnosis: herniated disc (back). He's expected to miss about 3-4 weeks. | | MR Manuel Patriarco was injured while pitching. The Diagnosis: mild calf strain. This is a day-to-day injury expected to last 4 days. |
| Monday, March 24th, 1980 | | MR Ramón Moya was injured while pitching. The Diagnosis: dead arm. He's expected to miss about 2 weeks. |
| Monday, March 17th, 1980 | | MR Gustavo Vélez was injured while pitching. The Diagnosis: biceps strain. He's expected to miss about 2-3 weeks. |
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