Guzman appeared in one game during the 1972 season, throwing one innings and allowing one run, which would turn out to be the last Big League action he’d see even though he was only 22 years old at the time.
Originally up in 1969 as a 19-year-old, Guzman appeared in only 12 games over those four seasons, with a high of eight in 1970 when he picked up his only Major League win while starting three games and throwing a complete game.
After pitching in the Chicago White Sox organization during the 1973 season, Guzman was out of Pro Ball for good, finishing up with an MLB record of 1-2 with an earned run average at 4.50 over 32 innings of work, all for St. Louis.