Game used Pacific Coast League Minor League professional baseball umpire shirts worn by Michael Alvarado during the 2000-2001 seasons. Michael was a professional baseball umpire for several seasons including the PCL, southern and Midwest Leagues before a car wreck caused by someone else ended his career. These game used shirts were for use on the bases and behind the plate as it is marked on the tags on the shirts say "plate" and "base". I obtained these shirts at his parents house when they were having a yard sale.