MINNEAPOLIS, OCT. 23 -- Terry Pendleton's recovery from a pulled muscle in his left rib cage has been so rapid that he could play third base for the Cardinals the last two games of the Series.

But he probably won't. He still can't hit right-handed and designated hitters will be used in the Metrodome this weekend . . .

The Cardinals had another injury scare in Game 5 when Herzog saw catcher Tony Pena limping around first base after getting an eighth-inning single. As it turned out, Pena wasn't hurt.

"He wanted to steal second and was limping around trying to make the Twins think he'd pulled a muscle," Herzog said. "He fooled me, and I took him out. He came in the dugout and said, 'I was just kidding.' I said, 'Don't do that. Hell, I didn't know you were kidding.' " . . .

Now, it's the Minnesota Twins' turn to complain about the conditions of the other team's field, especially about Vince Coleman's bad-hop single that started a four-run St. Louis sixth inning in Game 5.

"That's the worst infield I've ever seen," third baseman Gary Gaetti said. "It's really hard some places. Other places it's just chopped up. It's just terrible. {Tony} Oliva was saying that the fact the football team plays here and the way they have to change the dirt affects how it plays. They raise it and lower it and have to take some out." . . .

A St. Louis newspaper pointed out that, in three days at Busch Stadium, introductions were made for a dog, the Clydesdales, Moe Drabowsky, a folk group, a woman who sang for the pope, a publisher and a rock singer. Left out was injured Cardinals first baseman Jack Clark, whose 35 homers and 106 RBI made it all possible . . .

Curt Ford, the hero of Game 5 for the Cardinals, was a college roommate of Boston's Oil Can Boyd at Jackson State . . . Coleman's six steals are the most by a player in the World Series since Lou Brock had a record seven in 1967 and again in 1968 . . . The Cardinals' bullpen continues to do everything right. Ken Dayley, who had elbow surgery last October and didn't pitch until May, has worked three scoreless innings this Series. In seven career Series games, he has 10 1/3 shutout innings. . .

Likewise, reliever Todd Worrell has been outstanding. In three games, he has pitched four scoreless innings and has two saves . . . This is the eighth time in Series history that home teams have won the first five games. It last happened in 1981 . . . The only player who hasn't played in the Series is St. Louis outfielder John Morris . . .

Minnesota's Dan Gladden is the only player to hit safely in all five games. . . Pena continues to bounce back from his slow regular season. He's hitting .378 in postseason play . . . Herzog began his news conference today by telling reporters: "We landed at the airport, and President Reagan called. He thought it was a five-game series and that we'd won."