| Wednesday, September 3rd, 1958 | Activated CF Rafael Mendoza from the disabled list. | Friday, August 15th, 1958 | Placed RF Salvador Rangel on the 15-day disabled list. | Tuesday, August 5th, 1958 | Placed CF Rafael Mendoza on the 15-day disabled list. | Thursday, June 26th, 1958 | Activated LF Joseph Smith from the disabled list. | Wednesday, June 18th, 1958 | Placed SP César Guzmán on the 15-day disabled list. | Sunday, June 15th, 1958 | Drafted SP Jesús Morales in the 1958 first-year player draft (Round 6, Pick 14, 100th overall pick). | Drafted SS Rafael Mendoza in the 1958 first-year player draft (Round 7, Pick 14, 117th overall pick). | Drafted SP Toby Gordon in the 1958 first-year player draft (Round 8, Pick 14, 133rd overall pick). | Drafted LF Dave McKee in the 1958 first-year player draft (Round 9, Pick 14, 149th overall pick). | Drafted MR Alfonso López in the 1958 first-year player draft (Round 10, Pick 14, 165th overall pick). | Monday, September 30th, 1957 | Activated 2B Luis Olivarez from the disabled list. | |
|