Bad behavior at sports events has moved front and center again, with (1) the Big Ten asking almost everyone it can think of what to do about rowdy fans and (2) the president of the American League reprimanding Yankee Manager Billy Martin for obscene gestures on the field in Baltimore and Cleveland.

With Wayne Duke, conference commissioner, concerned about "the deteriorating crowd control and problems related to unsportsmanlike conduct throughout the country," the Big Ten has circulated a questionnaire to athletic departments, students, reporters, athletes, security guards, season-ticket holders and game officials.

Said conference publicist Jeff Elliot in Chicago: "The final touch may have been the Woody Hayes incident with the television cameraman at the Ohio State-Michigan football game . . .

But there were other incidents - passing young ladies up through the stands and I understand part of a goalpost was dropped out over the stadium at a Michigan State game."

Elliot also cited bands' shenanigans to distract free-throw shooters in basketball plus chants of obscenities, and graphic displays thereof, by students.

Lots of luck.

As for the Yankees, where Al Rosen, new club prez, had been dodging dubious Rosen-Martin feud reports in the feud-hungry New York media, he said AL President Lee MacPhail's notice about Martin's conduct - "a warning" that recurrence will bring punishment - "was tremendously upsetting to me. I believe," continued the old Cleveland third baseman, "in the Yankee tradition. There is an obligation by all concerned to uphold that tradition" . . .

Coach Jerry Tarkanian and U. of Nevada-Las Vegas officials are due to testify here today before the House's Moss subcommittee investigating NCAA enforcement procedures. Rep. Jim Santini (D-Nev.) instigated the wide-ranging review last summer in anger at the two years' probation NCAA slapped on UNLV's basketball program along with demand that Tarkanian be fired . . . In Philadelphia, Leonard Tose has bought out the 29 percent of the Eagles held by Herbert Barness, his great friend in 1969 when Barness brought him together with Jerry Wolman to take the NFL team off the bankrupt Marylander's hands for $16.1 million, but bitter enemy later. Tose's lawyer says this settles the Tose-Barness differences, but now-94-percent owner Tose will proceed with his $12 million suit against the bankers he claims joined in efforts to take the franchise away from him . . .

Cathy (Cat) Davis, the lightweight champion who has popularized (?) women's boxing, took a few on the chin and elsewhere in Atlanta Wednesday night. She was floored several times by Connie Smith of Chicago and stopped in three . . . Ronnie (Mazel) Harris, 26-0 as a pro since winning an Olympic old medal 10 years ago, finally gets a title shot July 8 in Buenos Aires against new middleweight champ Hugo Corro. So Sugar Ray Leonard at 11-0 knows there is still plenty of time - and can progress via a 10-rounder July 18 in Boston versus Dick Eklund, 14-1, of Lowell, Mass. Eklund, 21, is managed by his mother, Alice Ward . . .

The Concerned Athletes of Washington hold a second annual inner-city football achievement clinic tomorrow and Sunday, Dunbar High, 11 a.m.-2 p.m. More than 300 youths 10-17 are expected to meet and learn from such heros as Charley Taylor, Willie Wood, Frank Grant, Howard's Coach Doug Porter et al. Chairman William Craven invites one and all, with participating youngsters to report at the school, 3rd and O Streets NW, at 10:30 . . . Football comes to NoVaCoCo! Well, the Interstate League's Chambersburg Cardinals will hold tryouts 2 p.m. Sunday (info., 457-3432) on Northern Virginia Community College's Annandale campus (Rte. 236). And the Frederick Falcons want folks to know they're back in the same league - members since 1968, they say out '77 . . . The Bullets, as usual, invite season-ticket holders to sit in at today's noonish NBA telephone draft . . . Cal Ripken, Baltimore Oriole coach, and the Birds must have smiled as Cal Ripken Jr., Orioles' second-round draft choice Tuesday, won Aberdeen a state title with a two-hit, 17-strikeout conquest of Thomas Stone at Prince George's Community College . . . Alexandria Duke outfielder Mickey Mantle Jr. progressed from .000 to, at last count, .070. Four for 57. Hang in there.