With the Braves, Mattos was used mainly as a passer, throwing for two touchdowns in three games before a broken leg ended his season.

The Rams used Mattos as a running back and as a wide receiver and as a kicker, to leading the league in scoring.

The four players were Mike Sebastian, Stan Pincura, Bud Cooper and Harry Mattos.

[8] The Little Giants got off to a slow start in 1940, and when Ed Danowski was signed by the team, there wasn’t much need for Mattos.

As a result, he was traded in midseason to the Paterson Panthers, where he led the team in a late drive that earned them second place, behind the Giants.

[9] In 1941 Mattos played the full season with Paterson, and led the American Association in completions and passing yardage and made the first all-league team as the Panthers repeated their second-place finish of a year earlier.

However manning shortages related to World War II closed down the American Association.

A new team formed in the midst of the wartime manpower shortage, the Wolves failed to win a single game.