Percy White, the 6-foot-6 1/2, 245 pound stanchion of De Matha's city champions-not to mention MVP of the 1978 Greater D.C. summer basketball league- has signed to play his college hoops at Western Kentucky.

The signing was by a Western assistant coach name of Ray Hite. That's right, and old De Matha player, and that's recruiting, filled with "it's who you know" stories.

For instance, last week when Cardinal Gibbons' brilliant Quintin Daily announced his choice, U. of San Francisco, who was at the press conference in Baltimore but Reggie Jackson, in town for the Yankee Oriole series. Matter of fact, scene of said gathering was the Randallstown home of Jackson's sister.

Seems Reggie's niece is Dailey's girlfriend, and she plans to enroll in a fashion design school in the Bay Area, living in Reggie's Oakland digs the while, and that's the name of that tune.

"I wanted him to go somewhere where he won't have a lot of pressure." said Jackson. "That's why I didn't want him to go down south"-North Carolina was on Dailey's final list of five possibilities. Reggie!

But where they go isn't always where they stay. A year ago, Greg Goorjian, 6-2 guard who used to score something like 45 points per 32-minute high school game at California's Crescenta Valley where his dad was coach, picked Arizona State. Now, after a Sun Devil campaign young Goorjian said was hurt by dissension-teammates indicating he was a cause of the dissension, not a team player and undeserving of the starting job he won-he is transferring. To Loyola Marymount in Los Angeles, where his father lately hired on as assistant coach . . .

Ah, the Yankees. Sparky Lyle, "The Bronx Zoo" author and Texas Ranger reliever (who sprayed costly gasoline on fires in the late innings at Detroit and Cleveland within the past few days), pledged in his book, "When I come back to Yankee Stadium, I'm going to break that man's heart like he broke mine. That's a promise." That man is Lyle's former employer, George Steinbrenner, and Lyle comes back to the Stadium for the first time today-saying, "I'm here to kick Yankee butts" . . .