Trivia Time #12 & 35

Since 1901, 370 players got at least 7,000 PAs. Among that group, what distinction is shared by Dick Allen and Pinky Higgins and no one else?

Quick hints (since I have to leave soon):

1. The distinction exists in seasonal notation.
2. Here are the 7 players who just missed sharing that distinction with Allen & Higgins:

Harvey Kuenn

Dave Kingman

Larry Parrish

Bill Madlock

Bobby Bonilla

Mike Piazza

Frank Thomas

And since some have asked ... No, the title of this post is not meant as a hint.