Hall of Fame pitchers ERA+ less than 100.

Careers, From 1901 to 2015, Hall Of Fame Members (as mlb players), (requiring earned_run_avg_plus<=100 and At least 1000 Innings Pitched), sorted by greatest Adjusted ERA+

Careers found: 0.

This is in stark contrast to the 13 Hall of Fame batters listed in the previous post with OPS+ less than 100.