After the dropoff to just ten Top 300 first halves in the 80s, we bounce back to a more robust 21 in 1990-99, a grouping that features many controversial players.
Was anyone "roiding" in 1993? Can we take Jose Canseco at his word? (Insert flatulent noise here...) The only "inflated" number in this brace of seven Top 300 first halves belongs to John Olerud, who broke Earl Webb's record for most doubles in the first half. (To be fair to Webb, he hit his 36 doubles in just 73 games; Olerud would add only 17 more in balance of his fine '93 season and wind up with 54, far short of Webb's full season record.)
Andres Galarraga gave Olerud a run for the top first-half BA in '93, with a little bit of help from the thin air up in Denver. (Galarraga was hitting .413 at Mile High Stadium at the All-Star Break that year, and wound up hitting .402 at home for the season.)
This list now features two Hall of Famers--Rickey Henderson and Fred McGriff. It should feature a third, but "roid rage" simply will not die off.