MINNEAPOLIS, Oct. 24 -- Whitey Herzog's first inclination had been to bring Danny Cox back on two days' rest, but tonight he switched back to rookie Joe Magrane, who has an 11.57 ERA in two postseason appearances.

Herzog said Cox and everyone else would be available for relief in Game 7. He declined to say why he changed his mind, but apparently decided having Cox pitch so soon after throwing 95 pitches in Game 5 was too much to ask.

"I want to see if we can get a few innings from Magrane," Herzog said. "We want to try and stay as close as we can and see if we can score some runs. We got some today, but we couldn't get 'em out."

Magrane will be the sixth rookie to start a Game 7. The last was Mel Stottlemyre of the Yankees in 1964. Two rookies started Game 8 in 1912. The series went that long because of a tie in an earlier game . . .

Minnesota will counter with ace, left-hander Frank Viola, who won Game 1 and lost Game 4 and has a 4.76 ERA. In four postseason games, Viola has a 5.01 ERA and has been sharp only once.

"I'm just happy I have a chance to redeem myself after my last start," Viola said. "I have a chance to end the season on a much better note."

He discounted pitching on three days' rest, saying, "That's very overrated. The media played that up in my last start, but it had nothing to do with the way I pitched. I felt great in St. Louis. I just kept getting behind -- ball one, ball two -- and when that happens, you're going to get beat no matter who you're pitching against."Testing Decade of Parity

In this age of parity, the Minnesota Twins have a chance to be the 10th team to win a World Series the last 10 years.

The St. Louis Cardinals could end that streak at nine because they also won the Series in 1982. Even if they lose, they might be as close as baseball has to a dynasty, having won pennants in 1982, 1985 and 1987.

The Cardinals have averaged 88 victories per season in six full seasons under Herzog. This season, he became the 37th manager to win 1,000 games. In 11 full seasons, his teams have won six division championships.

No team has repeated as a Series winner since the Yankees won back-to-back in 1977-78. This is the longest span of different winners in Series history, the previous being six years (1967-72) . . .

Herzog has sent Tudor to the mound twice in the last three years with a chance to clinch a World Series, and Tudor has allowed 14 hits and 11 runs in 6 1/3 innings. He allowed five runs in 2 1/3 innings in Game 6 in 1985 in Kansas City . . . The 11 hits is the most Tudor has allowed all season . . .

Kent Hrbek's grand slam was the 14th in World Series history . . . Hrbek's slam ended reliever Ken Dayley's streak of 10 1/3 consecutive shutout innings in World Series play . . . Puckett is the 15th player to have a four-hit Series game. The last was Milwaukee's Robin Yount in 1982. His four runs also tied a Series record . . . The Twins have gotten their seven homers from seven players, also a record . . .

Hrbek on life in his hometown: "I watched the Vikings lose. I watched the North Stars lose. I watched Hubert Humphrey lose. It's tough to watch. And it's tough to change back."