Rails players with known* career slash lines (batting average/on-base percentage/slugging average) of .300/.400/.500:

Jay Anderson (1981-82) .314/.422/.605
Todd Johnson (1983-84) .330/.427/.500
Mike Pehl (2000-02) .333/???/.578**
Jake Comnick (2002-04) .340/.402/.544
Justin Scanlon (2008-11) .424/.503/.545
Ryan McCarthy (2010-12) .385/.479/.597
John Aase (2014-17) .386/.475/.618

*PHS baseball is missing stats for the 1947-69 and 1991-99 seasons.

**incomplete OBP stats for 2001