AP flash from western Pennsylvania: "Slippery Rock State College coach Bob DiSpirito isn't giving away his teams secrets before Saturday's nationally televised opener against Millersville." Sorry, fans, coverage of everybody's favorite football team isn't national enough yet to reach D.C.; take Alabama-Nebraska or leave it . . . U. of Virginia fans, if you can pick up Len Hathaway's Cav-Texas radio play-by-play from somewhere down yonder, no action today from Austin until the weird hour of 5 p.m. EDT. Seems Southwest Conference members moved their September night games to 4 p.m. their time to save energy, accommodate out-of-town fans or please the press - pick your explanation. But some SWC trainers and team doctors protest that's the hottest time of day in Lone Star land - so hot last week at 110 on field with high himidity that they fear for the health of the players: wooziness ran rampant last week. And visiting coach Dick Bestwick, whose Wahoos rate 31-point underdog to Texas even on the crispest day, amens: "It's stupid to play at the time . . . ridiculous to subject the player to those temperatures" . . . How hard is it to hit .400? Rod Carew went 10 for 19 in this week's Chicago series and his average inched merely from .376 to .381. Going into last night's Minnesota Twin tilt, Carew had averaged exactly four official at-bats a game; if that holds and he gets 60 times up in the final 15 games, he needs to bat .583 from here in. That would mean 35 more hits, giving him a final 253 for 632. Give up, Rod? "If it's going to happen, it'll happen, I'm not going to worry about it." Tired, Rod? "Not in this kind of weather." He means cool September - but the Twins headed into - sweat - Texas last night. What's the meteorological word, Sam Houston? . . .