I got screwed out of 2 answers in the .300 column because I have no idea what constitutes qualification for the stat
7/9
Sean Rod (1%) - Josh Donaldson - X
Chris Stynes (.04%) - Edwin Encarnacion - Rose
Paul Waner (1%) - X - Nap Lajoie (0.9%)
I said Johnny Bench before Rose (Baseball Ref says he hit 300 one year but only played 58 games) and Javy Lopez for the Braves (he played 129 games the year he hit 300... I don't know what more he needed lol).
I think to qualify for .300 on the season you need to average 3.1 PA per team game. Without looking at Javy Lopez's season, he was probably close but not quite. Wouldnt doubt he had 5-10 games of PH duty.