the effect of probiotic supplementation on markers of immune and endocrine status in division i baseball playerstownsend jr, bender d, vantrease wc, sapp pa, toy am, woods ca, johnson kd. the effect of probiotic supplementation on markers of immune and endocrine status in division i baseball players. poster presented at: fifteenth international society of sports nutrition (issn) conference and expo; june 7-9, 2018; clearwater beach, fl.