May 29th, 1993 - After allowing a ball to bounce off his head for a Homerun a few days before, Jose Canseco escalated the wackiness of his week by taking the mound for the Rangers during the 8th inning of a blowout loss to the Boston Red Sox. Jose gave up two hits, walked three, while allowing two runs in the eventual 15-1 loss to Boston. Worse yet, is that Jose had to undergo Tommy John Surgery a few months later and never threw another pitch in his career.
By the way, that side note about a non-pitcher referred to Rangers Shortstop Jeff Kunkel who moved to the mound for 1.2 innings deep in a 19-3 loss to the Minnesota Twins. Jeff gave up 4 runs on 4 hits, & walked three.