Former Teacher Wins Wisconsin's Largest Megabucks Jackpot Ever

— -- A former high school teacher won Wisconsin's biggest Megabucks jackpot ever -- all thanks to a quick trip to pick up a gallon of milk.

John Rumpel, of Milwaukee, won $22.2 million from a Megabucks drawing, the Wisconsin Lottery said in a news release on Friday, marking the biggest Megabucks jackpot ever since the game began in 1992.

Rumpel said he bought the May 30 ticket at a convenience store after his wife asked him to pick up a gallon of milk, ABC affiliate WISN-TV in Milwaukee reported.

"It wasn't until after the drawing that I flipped on the news and saw that the winning ticket was sold in Milwaukee," Rumpel said, according to WISN-TV. "I looked up and saw this convenience store and went 'Oh man, that might be me.'"

Rumpel chose the cash option of $15.7 million, the lottery said.

Rumpel declined to comment to ABC News today.

Wisconsin Lottery spokeswoman Stephanie Marquis did not immediately respond to ABC News' request for comment.