Frank Kush and Doug Moe are back in business as head coaches.

Kush signed a three-year contract yessterday with the Hamilton Tiger-Cats of the Canadian Football League. Moe moved up from assistantship to command of the NBA's Denver Nuggets in place of Donnie Walsh.

Kush, the 176-game winner at Arizona State, accepted employment in faraway Ontario just as ASU officials were preparing to appear before an NCAA panel to explain more than 70 charges developed from a probe of the athletic program that arose from Sun Devil Kevin Rutledge's charges of physical abuse against Kush.

Now, at 51, he sounds eager to work for Hamilton owner Harold Ballard, another fellow with a short fuse (he let Coach John Payne go after a 48-10 loss to Edmonton in the Grey Cup final). The Canadian game's three downs, 12 men on a wider and longer field intrigue Kush, he says, and Tiger-Cat players say he may have to make other adjustments.

When questioned last year about his habit of grabbing face masks and slapping players on the helmet, Kush never apoligized or said he planned to change. Warns Ti-Cat quarterback Bruce Lemmerman: "We have some super football players, but give them a bad time and they'll sulk."

In Denver, it's one old Carolinian (North) for another (South) as Walsh, according to a Nugget spokesman, "went into (Club President) Carl Scheer's office and . . . basically, said the team isn't doing well, attendance is down, we're in a downswing and maybe a change would be for the better." Walsh's version: "I told Carl, if this team needs having me fired, do it."

Moe is tabbed "interim" coach, but so was Walsh when he replaced Larry Brown in February 1979 and he stayed in as full-fledged coach all last season up to now. Moe, former ABA all-star, won 177, lost 135 as the San Antonio coach until fired last March.

One more gentleman restored to head coaching: Ed Wyche, who used to do it at Howard, then Delaware State; promoted from assistant to the top at Hampton Institute (now that Hampton won't be playing the Bison anymore?). . .

Back to Ontario: Ferguson Jenkins, cited in 1979 with the prestigious Order of Canada as a distinguished citizen, and in 1980 by the Royal Canadian Mounted Police with charges of possessing cocaine, marijuana and hashish, comes before provincial court today in Toronto. If convicted, the veteran pitcher could get six months in jail and/or a fine of $1,000 -- about twice the street value of the drugs allegedly found in his luggage Aug. 25 when the Texas Rangers arrived to play the Blue Jays. Baseball Commissioner Bowie Kuhn's office is not saying whether conviction might lead to suspension.

Jerry Reinsdorf, the Skokie real estate developer, and 29 fellow Chicagoland investors have gained a unanimous nod from the White Sox board of directors as prospective purchasers of the American League franchise, negotiations to commence apace. Board Chairman Andrew McKenna pegs the bid as "very close" to the $20 million offered by spurned Ed DeBartolo . . . bThat spurning ignited a fresh outburst this week by Bill Veeck, lame duck White Sox president, saying he hoped the Dave Winfield deal turns out to be a "disaster" for Yankee owner George Steinbrenner, a "convicted felon . . . (and) liar." Veeck echoed the old Billy Martin terminology in bitterness that Steinbrenner endorsed DeBartolo at the league meeting in the Sox sale, then voted against him. The New York entrepreneur retorted, "I think I can safely say that the last vote that went so strongly against Mr. DeBartolo was in fact, a vote against Bill Veeck . . ."

Doug Single, the new athletic director, at Northwestern by way of Stanford, met here two weeks ago with U. of Virginia officials about succeeding Notre Dame-bound A. D. Gene Corrigan. Naturally, rumors about a Northwestern football coach reach out to touch Navy's George Welsh. a