At 11-under 205, she holds a seven-shot lead over Patty Sheehan, Dottie Mochrie, Martha Nause and Tammie Green.
With Dave Stockton holding a seven-shot lead going into the last round of the 17th United States Senior Open, it seemed that the only question was who would finish second.
Rentz's total of 132 gave him a seven-shot lead.
Last year at the Texas Open, Ogrin took a seven-shot lead over Woods to the final round.
Arnold Palmer was never the same after losing a seven-shot lead on the final nine of the 1966 United States Open.
Calcavecchia reached 26 under at the par-3 fourth hole, but bogeyed No. 5 and made the turn with a seven-shot lead over Mediate.
The eagle gave Sorenstam a seven-shot lead over Burton and everyone else in the field.
Five Tied for Third Inkster's two-day total put her at 12-under 130 and gave her a seven-shot lead over Nancy Lopez, who is at 137 after a 70 today.
Going into the last day with a seven-shot lead, Rentz said he wanted to play "reasonably conservative," and he did that very well, with pars on the first 15 holes.
He started the day with a seven-shot lead and finished eight shots in front for his second consecutive triumph in the $100,000 tournament.