Greatest 21 Days
Born: May 7, 1961
The Dominican righthander was signed by the Astros system in 1978 but he didn't arrive in Houston until 1986. He spent parts of two seasons with Houston, posting a 2-7 record with a 4.47 ERA, splitting time between starting and relieving.
After being waived by the Astros, Hernandez tried to catch on with the Twins before seeing his final big league action in 1989, pitching one scoreless inning with the Mets.