He is best remembered for coaching the Massillon Tigers to an Ohio League title in 1906, over the Canton Bulldogs, which led to accusations of a betting scandal.
Wightman was named the coach of the Massillon Tigers in 1906 after E. J. Stewart was promoted to the title of team manager.
Wightman's first order of business was to replace four of the Tigers players who were a part of the club's 1905 Ohio League championship.
At the end of the season, Canton and Massillon decided to play a two game home-and-home series to determine the 1906 Ohio League champions.
Homer Davidson, who was considered the best kicker of the era was also signed by Wightman for the game, just in case Massillon needed a field goal or extra point.
Meanwhile, Dr. Harry March stated in his 1934 book Pro Football: Its Ups and Downs, which documented the scandal, that Wallace persuaded a Canton player to deliberately throw the game.
The team defeated the Columbus Panhandles, with the Nesser Brothers in the line-up, 13-4, and celebrated its fifth consecutive state championship.
While the Giants had never been a major factor in the "Ohio League", the transfusion of the ex-Tigers players instantly made them a powerhouse.